Why does AirBnb even allow more than one listing per user? How many people have multiple residences which they can legitimately rent out legally? It seems like it would stem a lot of criticism if they only allowed one residence per user, along with real-name and address verification (which they already use for renters).
There are a few places listed, for example in California, that are actually registered as hotel/hostels and pay city taxes and advertise multiple rooms. Though, I don't see they should be on AirBnB in the first place (my view is that if you are a business you should not be on AirBnB).
As an AirBnB user I would really like a way to at least filter such places out of my searches. When I rent on AirBnB I want to rent from an individual who lives in their home; I see it as basically couchsurfing but with money and (often) nicer accommodations. If I wanted to rent a hostel bed or a room from a vacation-rooms-for-rent agency, I'd be on another site. I basically treat them as spam in the search results.