He wasn't innocent though. He was going to go attack a server that has nothing but good intentions. Xalos clearly states there that he doesn't want people like that on his server. It's a totally justified ban.
I'm rereading the op over and over again and I see no grounds for a random ban.
Xalos was going off of pure assumption and suspicion.
Either way, you just don't ban someone who hasn't done anything malicious to the server just to circumvent others being malicious.
Would you like to be banned from your favorite server because the host wanted to make a point? Even though you did nothing wrong?