It's reasonable for AirBnB to verify that their hosts are in compliance with the law.
I am a landlord: I let a single house, to a family. New regulations came in on 1st September, requiring the property to be registered. I already had a valid gas safety certificate, expiring in 2 months, and an electrical safety certificate good for two more years. Registration also required an energy performance certificate, which I had.
But collecting all these documents, along with the precise dimensions of each room in the house, including the kitchen and bathroom, has been a terrible hassle.
I'm a good landlord; I don't mess with the rent mid-term, I fix things quickly, aand I don't bother my tenants. They are good tenants; they are German, and Germans know how rental is supposed to work.
I live in a flat, and my neighbour is an AirBnB, whose owner lives in Bavaria, and whose "host" lives in another town. It seems to be a nice clean apartment; but it's illegal, because local regs ban holiday lets in homes that are suitable for residential use. AirBnB don't give a shit. I notified the local authority, and they're trying to close it down. The "hosts" have appealed, so this saga has been going on for a year.
The problems, for me, are that I share the front-door of the block with complete strangers (where my post is delivered); the guests don't understand UK recycling rules, and dump mixed waste in my recycling bin (resulting in non-collection); and sometimes they have noisy parties. More generally, most of my neighbours seem to be investment properties; there are no kids around here, and I only know a handful of neighbours. AirBnB has sucked the life out of this neighbourhood.