No no no. They're missing a trick.
So let's get this right, they haven't managed to stop the vandals and are having to resort to special camera equipment to catch or deter the offenders. Then they find a 47 old man in the nude wondering about the graveyard with a camera.
This seems like a gift from god to me. They should remove the camera and ask said nude 47 year old to stay in the graveyard during the night. Either that will deter the young vandals or they will beat him to a pulp. In any case one of your problems is solved and crime statistics are improved.
(gravestone for obvious reasons).