If offering a room, that's something I'd want to learn more about. I'm not convinced it's not possible to get them to leave if needed. Since you get a chance to speak to refugees before you commit, you could discuss areas that could be an issue - like whether they'd like to be out late etc.Also what happens when they go out and come home late/drunk etc. its not like you can just threaten to chuck them out.
We've had dozens of students from around all around the world stay with us over the last 10 years, and they've been great. 2 of them took the piss, but they didn't wreck anything, and they had to leave.my sister twice had foreign students to stay and said never again as they basically took the p1ss and recked the house. not saying the poor refugees would do this but i would guess if you take anyone in better a 40+ year old than a young adult.