>>Dramat+tj
Berlin had an extremely lively tourism sector before Air BnB existed and will doubtless continue to have one afterwards. Tourism is a double-edged sword anyway - it provides jobs, although often not particularly good ones, but it can easily grow to a point where it damages the cultural life or general quality of life for a host city. In this case I think the judgement has been made that AirBnB tourism does more harm to Berlin than good.