Not really worried about spawn camping at all, rarely an issue for SD games.
Camping can really reach to both ends of the spectrum in skill. low level COD style camping of hiding in a spot with low visibility until someone walks by, usually resulting in crap xp. (advantages being if you can't shoot you get element of surprise)
Other type of camping which is more about controlling an area with large visibility of the enemy (seen all the time in competition). This kind of camping you can tell where enemies are going to be coming from, tell your team, or pick them off from a position YOU choose to your advantage)
Both are camping but one is scrubtastic and the other is basically the best thing you can do in an objective based game.
"Camping" is standard in obj based games, DEF job is literally to camp the obj or choke points leading to the obj (some DEF will send out offensive groups now and then before spawn-timer hits 0)
With SMART someone camping the same tiny corner with no visibility should get [censored] after one encounter so don't worry bout it