The accusations are endless
You're kicking ass and chewing bubblegum, hell, you even just ran out of bubblegum.. The next thing you know everyone and their dog is calling you a f'ing cheater, a no skill hack. This makes you angry.. they won't like you when you're angry!!!
Cool down Hulkster, chances are, this is exactly what those noobs want you to feel because they know that getting you angry may throw off your rhythm.
So rather than getting pissed off and fighting with a bunch of immature kids:
Take it as a compliment
The next time someone calls you a cheater, act positive and say "thanks, now I know i'm good". Ignore whatever response they come up with after that. This is absolutely the best thing you can do to remain cool and keep your nerves under control. The worst thing you can do is try to defend yourself against someone hell-bent on throwing off your momentum. No matter how good a comeback you dream up, you've sank to their level and fallen into their trap. Playing angry will only make you play sloppy.
Expect to be banned
When you hit a certain level, expect to get banned.. and banned often. At one point I was banned within 5 minutes of connecting to nearly any server with an admin. Most of the time, these admins don't spectate you long enough to determine if you're cheating; The bottom-line is that if you're too good, they don't want you playing in their server as they know you will piss everyone off (including them) and cause people to find another server.
I wrote up a pretty good article a while back on the importance of controlling your emotions while playing and how to pull out of a slump if you call into one.. You can check it out here.
Oh and by the way, if you are cheating, check out this website: http://www.a1b2c3.com/suilodge/metfun1.htm