Comment by mike_hearn

AirBNB don't have a monopoly. Aside from obvious alternatives like hotels, VRBO is quite good and I used it successfully in the past.

I suspect the real reason this happens is a mix of recruiting ex-tech firm employees (they seem to treat abuse as if they were running a social network), and some internal data that shows just one or two bad experiences can cause a host to drop out permanently. There are way fewer hosts than customers, so if one customer repeatedly creates bad experiences then they need an ultra-tough policy as otherwise they'd burn out their supply of hosts too quickly. Hotels don't have this problem because they're much more committed to being hosts, such that a few bad customers occasionally won't cause them to simply shut up shop.