Bloomberg reports, San Francisco "sued five property owners for allegedly evicting long-term tenants so they could rent apartments out to tourists through Airbnb Inc. and other online home rental services." Here is the coverage in Bloomberg.
Although the Manhattan rental market is iconic for the difficulty of finding anything and the high prices, San Francisco may present worse obstacles. After all, it is a center for tech. Therefore, when tenants don't have their lease renewed they may be forced to move out of the area.
Clearly the worst of capitalism may have eaten into the ethos of the sharing economy. And there is not much players like Airbnb can do about this. After all, they can't investigate the history of every space which becomes available for a short-term rental.