At least these professional landlords own the properties and thus have some sort of stake in the matter. A friend of mine some how managed to rent multiple apartments at the same time and then rented them all out via AirBnb. He lived with his girlfriend, so he was essentially a professional landlord who didn't own any property.

I like AirBnb but with time it's warts are being exposed. After being racially profiled multiple times, having a host cancel on me at the last minute and sending my money back via Western Union, and other annoyances I now consider hotels about 50% of the time after almost exclusively doing AirBnb.