It could be a proximity sensor at home, a token of some kind, that you need to touch your camera with, say once a month to keep it going. A stolen camera like t

It could be a proximity sensor at home, a token of some kind, that you need to touch your camera with, say once a month to keep it going. A stolen camera like this would become useless after a month. Once it becomes common knowledge, it could deter buyers and thieves..