I have to agree with this and I am also guilty of this, as far as I know you can get an auto balance mod that does just what you want and I do hope the admins take into consideration the idea of implementing a better mod.
A lot of regulars do just what I do (that guy kicked my ass for the last two maps I am going to his team) and it isn't fare to the other players. I have tried the last week or so to not do that knowing they (the better players in the server) aren't going to even the teams.
Best of intentions and I hope this is helpful.