On one hand everyone is pissed that people are buying properties just to rent on airbnb (and home away, flipkey, vbro, etc...) and on the other hand we need to protect these same people from themselves?
You can't protect the predator and its prey.
If you want fewer people buying up properties for short term rentals you should want the weaker ones to have bad experiences and tell all their friends.
It's entirely possible to point out that both sides of the market may be harmed when "disrupting" a regulated industry. AirBnB takes a cut of the savings, but the risks are borne by the market participants, whether that means having your property trashed by bad guests, or your trip ruined by bad hosts. The "predator" in your analogy would be AirBnB itself.
