If it wasn't, idk. However, Mojang has no control over what people do in servers. That is up to the administrators, and your son may have just met the kind of person who deserves no power in a multiplayer video game. If he's feeling reluctant to play, then players are to blame, not Mojang. The community at large is actually very kind. Admin abuse is present in every game where servers are player-run, but not every server has that problem. If its the XBox version, I reccomend you get the PC version. A server that I think would be a good place to start is the Caznowl SMP; the admins never kick or ban anyone without reason.
Yes, it was on the Xbox, so thank you for your direction to a server on the PC version. Also with the information given to me by several of the other posters, I now understand that the manufacturer has no say in what the individual servers do. As I mentioned at the outset, I came on here mostly to vent....not knowing if or how I'd get any sort of constructive feedback. I definitely have and feel much more comfortable about dealing with it. Thanks for your input.
You see, as you know real life is very different than what we wish it was—to be a nice environment full of happy nice people. Unfortunately, there are enough people to ruin that. But teaching your son to accept that mean things will happen, even tragedies like Sandy Hook, will create a positive experience. That way he understands that it isn't his problem mean things happen, and that simply ignoring issues with the bully will make the bully feel unsuccessful, and so it isn't his problem.