flame,playing nervous with nervous people is a part of this game.
We do not say that we support this kind of behaviors.
Personally I check the flame situation,but mostly if its only 'retard,noob,idiot,' etc I do not ban the requested user.
It also depends on a situation,if someone calls other one 100 times noob,fuckn noob ,noob retard idiot etc I ban the dude.
However you must understand that auto mute or something like that cant be the solution,what if a guy constantly whispering u curses etc?You just need to use the !ignore command or other ignore bnet commands.