He's not renting a room off us, but if we hadn't intervened he'd be on the street at the moment. Sorry he doesn't fit your homeless stereotype (maybe I'll make him sleep outside for a couple of nights until he develops a heroin habit), and I only mentioned it to prove that some people DO do...
Already done it. Got a chap who's been evicted from his flat staying in our spare room for a while. And do you know what? He hasn't attacked me or nicked all my stuff .... yet. Obviously he will do because that's what all homeless people do don't they?