Crap like that makes me not wish to rent to people at all, though.
My story: I have a tenant who has become a friend and I desire to help him. His dad is dying of cancer, he's addicted to heroin, and he refuses to go to detox because going to detox is horrible. He hasn't paid rent in a couple months, and I've made a conscious decision to let it slide because the only other places he has to go are places that will end up with him doing every drug known to man. I know this makes me sound like a sucker, but I really like the guy, he's got a great heart, and he's just stuck in this awful place. I don't know really how to handle it because I'm not too experienced with heroin or my dad dying, but we're going to try to detox him here first. If that doesn't work (which it won't), I might get to have the go to detox or move out conversation with him, because as much as I want to help the guy I feel that having heroin in my house that I rent out to people is pretty much a 100% no go.