Earlier quoted context omitted.
I don't think Hilton, Hyatt, Wyndham or Marriott give a shit about Airbnb; they do a full Airbnb valuation of real revenue every other quarter, and the market they service isn't "random places to stay", it's "hotel rooms". The preponderance of evidence available to message board nerds like us suggests strongly to me that enforcement of these laws is being driven by real complaints.
Airbnb is a future threat to the hotel industry. I'm sure they recognize that. Most people are potential "hotels". This will keep rates low AND attract new entrants (because some money is better than no money). Airbnb rooms are usually more pleasant than the lower quality hotels a lot of businesses book. Once it becomes socially normal in larger corporations, a lot of employees will ask to be booked with airbnb.
I'm saying: I doubt that's what's happening. I've heard too many anecdotal stories about complaints, and am too capable of looking at (a) revenue numbers for hotels and (b) stats on how people book hotel rooms to think that anyone at Marriott is really being kept up at night about this.
At some point, Airbnb will be too big and disruptive for the major chains to ignore. But now? I doubt it. I think cities are reacting to complaints.