If you know of tax cheats, at least at the federal level, "bounties" can be paid to informers, I believe this is in effect now and has been for many many years. I am sure that a lot of BNB scofflaws are not even paying federal estimated taxes, their hiring practices may also be avoiding withholding of income taxes, social security, etc, for any of the people employed to work on the yard, make the beds, etc. Of course the phony owners will say "they are contractors" which we know is a smokescreen to hide irresponsible labor relations. An AirBNB has to pay fed, state taxes, and county taxes....lots of taxes. But don't let the gov get away with allowing AirBNB to meld all payments into one lump thereby hiding individuals.  How can laws be enforced if we don't know which house and owner is responsible?