Six months have passed since New York City all but banned short-term rentals like those offered via Airbnb. The policy was intended to free up apartments in America’s most congested city to become homes for long-term New Yorkers, instead of housing rotating out-of-town guests that bring noise, trash, and worse. So far, the law’s most noticeable effects seem to be sending droves of tourists to New Jersey and frustrating small-time Airbnb hosts.