My experience of AirBnB is a little different. A couple of summers ago, I travelled around Europe for two weeks and every single night except one I stayed in an AirBnB house.
Back in the early 1990's, I lived/worked in Europe for a few years, including a lot of travel, but found it extremely difficult to make any but the most superficial contact with local people. (Granted, working 80 hours/week didn't help...)
Compared to that, the AirBnB trip was absolutely amazing in terms of *being* in the culture. I was able to carefully choose my stays using the profiles and was able to meet and spend time with a priceless variety of people: people with cats, people with awkward teenagers or adorable tantrum-throwing urchins, people who lived in semi-restored historic ruins, bohemian weirdos with artsy communal lifestyles, widowed intellectuals with priceless antiques and hours to spare patiently correcting my grammar, people who forced me to eat and drink meals worth 3x what I was paying them, all of whom didn't speak (or agreed not to speak) a lick of Anglais.
I've quietly viewed enough churches and paintings already; my goal was to break the insurmountable barrier of politeness and actually make contact with regular people, people who aren't trained in the hospitality-industry art of being efficient and polite. It took some work, but with a lot of "screening" beforehand I managed to arrange some unforgettable experiences.
My understanding of the origins of AirBnB is that this was precisely the kind of experience the creators had in mind - real people sharing their homes and lives. Maybe not, but I have a rather gullible and idealistic nature and refuse to believe otherwise....
What irritates me the most about AirBbB today is that, because of it's success, that type of experience is becoming harder to find. Now it seems swamped with commercial-minded property owners seeking to cash in on their dull, anonymous real estate investments. (And as a dull, anonymous real estate investor I can understand this...)
If I could suggest (or impose!) a change on AirBnB it would be to improve the social media/personal profile/search tools so that the face-to-face, life-sharing kind of experience I had would still be available.
Maybe the authorities just neet to tax the €¢£$ out of them so only the selfless idealists bother....