On the flipside of this, I've been kicked from games because I know how to prefire, and a lot of players see that and just assume you're wallhacking. Nobody pays attention to the 70% of the time that you prefire at air, but when you guess right and instakill someone holding an angle, it's easier to say "cheater" than "i've been holding this same angle for the past 5 rounds, perhaps I've become predictable"