'Camping' is a tactic used by agencies when they are taking a location.
Due to the fast paced combat and many features camping is not nearly as powerful as many other games.
Since all hit zones do the same damage it slows how fast you kill things compared to other games where hit zones do different damage depending on where you shoot.
Due to effects like the jet packs, bionic jump and shields it makes camping a very inefficient tactic for mid-term times. Occasionally a sniper/recon would camp a location to add supporting fire but when the fight moves on or his teammates leave, so would he.