Camping is a part of the game. If you are capturing an HQ or something, you usually go to a corner out of the way and wait for unsuspecting people to pop in. Or find somewhere hidden where you can see people and take them out.
It is an integral part of the game and everyone does it at one time or another. The trick is though to camp for a little bit, if needed, and then move before the smarter players send a few dozen grenades in your location if they can't sneak up on you.
That being said, I've been known to camp on occasion, but I get bored too quickly so I do run around a lot. But I mainly play HQ now, so staying in one spot for a little while is pretty mandatory
