Also, to add onto the problem with the donor and non-donor situation, is the fact that YouTubers have a big impact on this.
Take BajanCanadian as an example since he is the prime example of this. All these kids, as said before in the 10-13 year old range, seem to only talk like he would in chat- "hey dooooods, wanna team?" and other phrases of the sort. They are even getting these "bacca" skins because they wanna be just like Bajan. Unfortunately Bajan contributes to the problem of the community getting out of hand. He betrays people constantly in the game. These younger kids who adore him will start to do the same. "Hey doods, in benja we trust, lets betray ppl!" I have heard someone say that word for word. I cannot remember who because it was just another younger kid in the crowd of thousands. If you can control the YouTubers that set a bad example, then you can control the younger age group. This isn't really an option since Bajan isn't technically doing anything against the rules but you get the general point.
Now, for the older age group. It is in my opinion that they slightly older players tend to donate more to the servers. This is my belief, yet it could be completely wrong. The older players (possible donators) see how these younger kids are acting and immediately feel that they younger kids are "dumb" or "childish". This would give the older kids a reason to feel superior. If the older kids do not feel superior, then they won't be so mean to the younger kids who would, in turn, act mature when they become older instead of acting immature and cruel to the new younger kids.
This is all possible to accomplish and would fix this problem but would need help from the entire community as one and the help of close watch of all obscenities in-game. In my opinion, this is the only community that could do this since this community seems different, closer. If you see a player picking on another or doing something against the rules in-game, please report them. Don't even say anything to them to warn them. They should know the rules already and will actually start taking them seriously if they get a notification telling them to stop or be banned or something of the sort. I think the rest is self-explanatory.