I, too, love externalities when other's bear the cost, and hate them when I bear the cost.
Consider something like the Outer Banks for North Carolina, where nearly all the homes are rented out for vacationers. There's an expectation and knowledge of what to expect from the neighborhood (for example, multi-hour delays on the weekends as move in/out happens).
That's a very different situation from buying a home in a neighborhood and then having every 3rd house turn into a hotel.
My point is not all AirBnB usage is equal.