That's actually kind of cool that (I'm assuming) he's opted out of society to fend for himself, more power to him. But totally whack the police are wasting so much time and money trying to catch someone who snagged some milk and clothing hanging to dry! Seriously- a helicopter with heat sensors??
If he chooses to live that way, that's his choice and he should not be persecuted for it.
It would appear that he poses no direct threat to anybody.
However...Theft is theft no matter who the thief is or their chosen lifestyle.
I think the level of police interest is partly for his own safety.
He probably wouldn't get shot, but some of those welsh guys would probably make sure he spent a while in a nice clean hospital bed if they caught him stealing in their community.