I understand your point Skeeter. In fact I have not seen your brother around for the longest time, but I remember he's was a good cop. Let him embrace it and proof to people that his voice isn't everything. Tell him to show people how mature he is and the fact that he can handle everything that's thrown at him. I have seen Pinkstreak handle this situations in the most mature way. Ticket them for verbal insults after the first verbal warning and if it keeps on going send him to jail. He has to let everyone know it doesn't bother him.
The people I've heard making fun of him are mostly new and "just passing by" players, not the regulars. I assure you most of the members posting right here right now are not in on the situation.
To those whom criticize the boy for being a squeaker while being processed. Obviously that person is more immature than you'll brother ever be so let him think about that. Every time he hears " Squeaker" , he should think.... " What an immature little child this guy is " and proceed to enjoy the game.
And last but not least...take it easy guys after all it is just a game but if he really feels he's being harassed just tell him to send video evidence and I am sure it will be more than dealt with. But to my opinion, he needs to stand up for himself in and out of video games.