[_delirium]

For really casual renters I can see that: I think the "couchsurfing for money" type of AirBnB really is new, and brings in casual renters looking to rent out a couch or a spare room, or occasionally a spare apartment while they themselves are gone.

But dabbling into full-time landlording, where you buy an apartment just to rent it out, is not really new or newly enabled by AirBnB. It's not like VRBO checks your sanity either; if you want to not pay attention to rental laws and get screwed on VRBO you could do that, too. Probably that has even happened, but nobody cares, because there's a cultural expectation that if you're renting an investment property on VRBO, you have an idea of what you're doing, and if not, that's your problem.

[sanderjd]

Yeah, maybe regulators will be able to figure out how to rein in the second use case without messing up the first. But that sounds pretty idealistic.