UPDATE: Less than 2 hours after submitting a ticket to AirBnB, one of their staff members called me on the phone. That alone is quite impressive and shows that they care about these issues. She gave me some good tips (which most of you have already mentioned): (1) use people with good review, (2) use people with high response rates, etc.
Imagine you started using paypal when it first came out, got ripped off and then paypal messaged you saying 'hey, next time try using someone with a higher rating'.
All it shows is that they've got no handle on vetting and by the sound of it absolutely no clue how they're going to start dealing with it either.
The other messages here saying contact 5-10 people first to weed the wackos, jeezus, AirBnB is actually starting to sound dangerous.