The 10 Most Annoying things houseguest do:
1. Arrive unannounced or without an invitation.
2. Snoop around.
3. Break or damage something.
4. Leave behind a mess when they're gone.
5. Be too loud.
6. Smoke.
7. Leave a mess in the bathroom.
8. Stay up late watching TV with the volume cranked up.
9. Go out and come home drunk.
10. Be too demanding.
