Well, I mostly play Call of Duty: United Offensive for the PC when it comes to online games. I also usually play Retreival, in which one team (usually Germans) guards the objective(s) while the other (Allies) attempt to get it and take it back to thier HQ. So, "camping" on defense is fine, except if your the only one left and the Allies have the obj. However, if your supposed to be on the Offensive, camp, and are the last one alive, you will most likely be kicked from whatever server your on. So for me, it depends on what your team should be doing and how many teammates are still alive.