One of the most dangerous criminals out there are firebugs,arsonist.Yes, get a paper trail going with police, pics and be aware.What really sucks is the creep waits until your gone.As mentioned, whats to stop him from burning down your home..?
Maybe some nasty surprises for the unwelcome intruder are in order.Since its illegal to trap or shoot him, there must be some kind of nasty surprise you can have waiting for him.I wouldn't be able to control my anger, if he'd had burned my barn with my goats inside.I guess i'd get arrested and go to jail, because if i ever saw him on my land again, i'd beat the living crap out of his butt, before he burned something else of mine down..Sorry folks, i know its not the best way to handle the situation, but thats how i would stop it if the police don't.