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).
But the MMS doesn't give you anything but that advantage as a sight. You loose 1 accuracy point and gain nothing but scanner. I think it's pointless to use 1 spot on your attachments for it. There are far better combinations IMO.