Download and use R1Q2 Quake2 Client and use the Ignore feature.Is he cheating? Is he breaking the server? No?Being an asshole fortunately isn't a banable offense here... unless your some child rapist nazi of course.
that sort of action would probably include muting him before any more drastic action like banning was considered.that way he still gets to play, if he is there to play at all, and nobody else has to have their good time ruined by his abrasive shit.
i probably have a 1% chance of ever winning in duel against you