> How is it fair if you let your druggie sibling come live in the house with you for the entirety of your lease?
Every NYC lease I've ever signed had a clause forbidding long-term guest stays. Besides, that's a persistent problem, easy and perfectly reasonable to report to management and have them deal with it.
In contrast, occasional AirBNB'ing (a few weekends a year per unit, say) is a lot harder to track down. There were 15 units on my floor, and maybe 4 or 5 of them would occasionally do AirBNB rentals. It's not like there was just one unit doing this constantly, which would have been a lot easier to report.
I also have to mention, you've now posted 3 different comments mentioning this hypothetical "druggie sibling" scenario. I've personally never encountered that situation, despite living in 7 different apartment buildings in 3 major east coast cities over the past 13 years. I have, however, repeatedly encountered disrespectful AirBNB tenants in multiple buildings. I don't really think these situations are even remotely comparable. There's no web site trying to profit from letting "druggie siblings" live with people, nor is there any major wave of this occurring.
> Telling the neighbor what they can and cannot do because you don't like it is not going to be fun when they're allowed to do the same back to you.
Well, since I never rented my place on AirBNB, never had long-term guests, and never otherwise broke major lease provisions... I don't really have anything to worry about there do I?