1. Camping and sniping is different.
2. I've yet to play a game online where a camper has bothered me. I have however gotten pissed numerous times at the jackasses that run around like idiots waiting to be spotted and have their heads blown off. Typically these people bitch about campers a lot.
I do whatever the situation calls for. There are times to camp a spot or area and there are times to move. It's called good strategy.