I am pretty obvious.
Make it obvious and you will be banned, just a warning. my brother got banned yesterday. Lol, serves him right I guess.
When I use to play, I would sit behind my base in Death Room and camp the doors in CTF, chams made it so I didn't have to keep thinking which door they would come through and I would prefire before the door opened so they had no chance of survival.
I would use a sniper and sort of stay in the back but still get a good kdr.
I usually stay back with a sniper, but I only get accused of chamming when I have no hacks at all, and I have to explain to noobs that I have EYES and EARS.