I personally don't differentiate between a camper or defender because I feel a defender is someone who is working towards winning a game through defending an objective whereas a camper generally does not help a team win.
Thank you for your input. I always do appreciate when someone adds to the conversation.
Communication is the anti-camper tool because it takes the surprise advantage away from the camper. Since equipment can be spotted and destroyed easily, I think it's harder "camp" by any definition of the word. Instead, a better descriptor for a person camping would be paranoid because you're constantly checking all entrances and windows for enemies (if you're good at it).