It is all very well Airbnb saying that you can cancel if a guest breaks house rules but by that time often the damage is done and police called. Another thing I don't like is Airbnb protecting a guests name and address when they have done damage and I want to prosecute. This has happened to me in the past year.
I stopped doing IB for ages as I did not like the type of guest that was contacting me - mainly because I am hosting in a party, trendy, seaside town. Currently I have IB back on but if a guest has no feedback or is a newbie and under 45 in age I ask for an £80 security deposit - that seems to do the trick.
Another thing I have noticed is that guests can have been members a good while and have no reviews even when they have stayed elsewhere before. What is going on there?