Just yesterday I had a guest with only 1 review (it was posted in Spanish, and the location said 'Mexico') check out of my house. They left it filthy and did not follow the house rules. I requested an extra $70 for cleaning up their mess, only to get a call from one of them stating that they are NOT going to pay the $70, period. I stated I would leave a bad review as the house was left in poor condition. The man laughed and said "haha, we don't CARE about a bad review...we just go and create a new account!"
So, this is a warning to all of you hosts: beware of guests who 'just joined' (probably for the 20th time) and have 'no reviews' (i.e. probably 1 star negative reviews every time they do get into an Airbnb).
BEWARE!!! I hope Airbnb will figure out a way to prevent this from happening to the extent it apparently is, after reading other hosts' posts on this topic.
I will only rent to guests with several positive reviews moving forward. This was the second and last time I have been stuck with horrible pigs.