It's a rude innovation.  I buy a condo in a private building, I should not have to put up with occasional renters bothering me and causing chaos and possibly damage and whatever else.  As a temporary resident they often have little manners or value of the property.  Buildings and condo associations as a whole should be able to decide whether AirBNB is allowed.  The same with neighbourhood associations, they should be able to say if this happens in their area.