I take accusations of hacking as a compliment. I'll admit I pull off some dodgy shots, mostly in the battlefield series, but it's something to be proud of, not ashamed of. What anyone who bans you is saying is, "I am afraid to play in the same server as you, because I can't do anything to counter you. You are too skilled."

...Same thing applies to REAL hackers, obviously, but then it's not "too skilled", it's just plain hacking. Just find a server with players at your level, and shoot at them. It's always more fun to kill players that are a challenge, after all.