Actually I responded directly to the claim that the professional properties are "usually not-well-cared-for" which was an unsubstantiated claim that is clearly

Actually I responded directly to the claim that the professional properties are "usually not-well-cared-for" which was an unsubstantiated claim that is clearly way too broad of a generalization. As far as nuisance guests, I've said elsewhere in the thread that I think the cities should not hesitate to give out large fines for recurring noise violations from one address. Party houses and frats also make a lot of noise even though they have nothing to do with vacation rentals. Banning Airbnb is a less direct solution to that problem than simply passing and enforcing noise regulations. People will just rent on Craigslist and make as much noise as they want if you don't.