Allow me to take your statement point by point then.
Players are well aware when we warn them since we get confirmation that they understand the warning, any of you who have been warned know we expect a reply. There shouldn't be any bewilderment or confusion about notes unless the player forgets the warning in which case maybe they should write it down since we will almost always note it in their file if we do warn them.
Receiving multiple warnings from the administration team should be a clear indicator of a player's downward spiral and be enough for them to think "Hey, maybe I should change my behavior and improve myself so I stop being warned by the staff and I don't get banned." Having access to their notes privately isn't going to help this unless you're speaking that it can jog their memory of past transgressions, at that point I refer you to the fact that if their memory is that poor about this maybe they should be keeping their own set of notes.
Notes are not focused solely on punishment, it is a way for us to share information with each other regarding either administrative actions taken against the player or if we want to say something positive for other administrators to consider. All players are given ample opportunity to self-correct considering its incredible rare for first offenses to be banned, usually requiring individuals to make multiple offenses at the time or show an utter disregard for playing nice with others and following the rules.
The inability to talk about bans publicly is mainly because individuals 9 out of 10 times will salt about their bans. They'll complain that the staff was too harsh or that they didn't do it and that the staff has an ax to grind against them. There really isn't much constructive to be gained about talking about a ban to the general public since they'll likely not know about the situation and only receive a story, more often than not, spun to make the individual complaining look like a victim and to rally support against badmins. Allowing players to do so and then just banning the individuals who do those actions really doesn't change anything, since the individuals who want to talk about their bans publicly are usually the ones who want to salt about it and the ones who don't realize "Hey, I fucked up and I really don't want to draw attention to this fuck up of mine." I know I personally wouldn't want to talk publicly about a ban if I ever received one since it isn't exactly something to write home about. As for stacking the deck, there are staff available to speak to them regarding their behavior if they honestly want to change, there's absolutely nothing preventing anyone from contacting us and asking "Hey, what can I do to be a better part of this community?"
Saying that being able to see notes and discuss bans will suddenly have the community policing itself and take a weight off our shoulders as prevention instead of cure hasn't taken into account the variables of friends and, cliques people of like minded nature who will not only agree with the individual that the administrator is wrong but will also reinforce the bad behavior, hell it happens even without the discussion of bans and notes being made available and nothing will really change that aspect.
As for players who have been banned for oopsies so to speak, if its just a singular oopsie incident there really isn't a lot of work involved in the appeal process, it only becomes an issue when multiple oopsies have occurred. At that point there really isn't an excuse for them not taking the opportunity to change their behavior if they've been banned/warned multiple times over the same oopsie or just general oopsies with multiple rule breaks.
Once again, nothing is stopping the player from remembering or taking note of their own warnings. They don't need access to administrative notes regarding this. Its very clear to us if an individual doesn't remember or doesn't care, the latter usually from multiple notes over a steady period of time The excuse of, I don't remember, is rather flimsy to begin with since it is a rather memorable moment to have an administrator contact you. I remember when I was contacted THE VERY FIRST TIME over something that didn't mesh with the rules over a year ago. Not only do I remember the administrator that contacted me I remember the conversation we had as well as the contents of it and let me tell you, my memory can be quite awful, I'd forget my own birthday if it didn't actually serve a purpose.
The only way I can think of players forgetting multiple times we've contacted them, which usually is the case before it leads to a ban, is if they've grown accustomed to it and simply don't care. That or they're living in a 30 First Dates scenario where they relive the same day over and over again because of memory issues. If I can remember something from well over a year ago, it really isn't a stretch to think the average person can remember a MONTH ago.
As for individuals who say "Well Bryan, what about notes from several months ago? From half a year ago? A year ago? Am I expected to remember that?" Usually no, those don't get taken into consideration if there's a large block of time between notes or when your last note is from a long time ago. Its when players start accumulating a good amount of notes after that long period of time we'll start referencing that since it either indicates A) That person stopped playing for the block of time and that's why there're no notes or B) They've burned themselves out and stopped caring.
Giving them the opportunity to look at their notes and saying "Well, you didn't look at your notes you had ample opportunity to change." well, they're not going to change regardless if they have their notes available to them. People who want to change will change regardless if they have access to their notes because they realize they've done wrong and they want to become a positive force for the community, to share in the fun and the laughs and are usually genuinely upset that their actions have impacted others in a negative way. People aren't going to magically want to start bettering themselves because they can see our notes and be reminded of their poor behavior at that time and making them public to everyone would just end up with players looking at other players notes and being shamed, even if they are good players now and had issues in the past, something There are people who will use it intentionally to shame or will bring it up in conversation not with the intention to do so but ultimately leading to that same outcome, something that I am vehemently against.
After addressing these points I'll leave you with some others.
There are notes that as stated before aren't administrative actions taken against the player but opinions of the administrative staff regarding behavior that may potentially be detrimental to the community or a potential rule break. Nothing is gained from players knowing these observations and it very much can be used to say "Hey, the administrative staff hates me! LOOK I HAVE PROOF! BADMIN SAID X ABOUT ME!" which is only a negative for us because then it makes us out to be the enemy.
There are notes that contain information about other players, things that players have said to us that we don't wish to divulge because it can open up the floor to other players not trusting the individual or ostracizing the individual completely because they ran to Staff to "tattle" on them. Nothing productive will come of this and the fallout from these actions would just create more work for us and ruin the game for those people who actively help and try to keep the server a good place for others by bringing these things to our attention.
It can place a barrier between the staff and the player base as some players are friends with staff and we have to do our duty as staff before being your friend. Nobody likes seeing something unflattering being said about them and it could negatively impact the relationships we have with those individuals in the community which would eventually end up in there being a divide.
As Necaladun pointed out, we'd have players requesting alterations or removal of notes which could very well increase our workload since we'd have to investigate the legitimacy of the note itself on a case by case basis.