The invisible ones that kill you with a grenade from 1000 yards are so 1337 with their pwnage skyllz, you are just jealous you can't be on their krew.
Meh. I play Warsow (open-source!?!?) and there are no cheaters. ^^
So if you make cheating too simple, people don't think it's fun anymore. That's the concept of open-source things.
"The Internet treats censorship as damage and routes around it." - John Gilmore