I can say in past games and past lives, teams I played with would encounter a team that was using obvious hacks and our decision would be simply to not play them anymore.
Yes, they may be #1 or near the top...but since they can't challenge down eventually they run out of people tired of putting up with their crap. One clanner asked me why in an empty server once and I told him while we couldn't prove they cheated (nobody hardly ever can prove such) we knew they did and since we don't and wouldn't that we simply didn't wish to play them again. All the dude could do was deny it...but he didn't do it very strenuously.
In addition to the cheats already listed, I'm aware of at least 2 more that have been getting a lot of play on the cheat forums lately. I personally witnessed a team on a pub server obviously using one and most likely the other. It's sad but what the hell can you do?
|HiFi|Euroranger
Team HiFi
The very existence of flame throwers proves that sometime, somewhere, someone said, "You know, I wanna set those people over there on fire. But I'm just not close enough to get the job done".