Probably, the city got many complaints about parties, trash, and different people every week. They're not fining for "using AirBnB" they're fining for "short-te

Probably, the city got many complaints about parties, trash, and different people every week. They're not fining for "using AirBnB" they're fining for "short-term rental" or "code violations". But AirBnB is the obvious way that you get short-term renters, so it's not a stretch to name them without any hard evidence.