A guest my neighbor met on Grindr is a random stranger with minimal vetting that will be gone the next day. Should we also regulate Grindr?

I don't see any difference that matters, nor do I see the underlying moral principle that allows me to distinguish between one and the other. The principle you've stated clearly isn't it, unless you also favor regulating Grindr.

(I'm deliberately choosing Grindr here in order to make my example conflict with left wing mood affiliation.)

Your neighbour is going to supervise their Grindr date (probably much more...intimately than any other kind of guest) and not leave them in the apartment for a long weekend while your neighbour leaves town. That's my scant understanding of Grindr, anyway !

Grindr guests are personal guests, not customers of a service like Airbnb guests. As another person stated, the Airbnb guest is likely to be unsupervised, and has no vested interest in keeping the house and local community nice other than general decency and their Airbnb reputation. This is enough for many visitors, but there are a portion that don't care.

Are you willing to admit that this may change the local community dynamics in a negative way for long term residents?

I use Airbnb. I think it's great (from my perspective). However, I understand why some may want to limit it.

I agree that lots of things might change "local community dynamics" - for example, a gay neighbor having a parade of flamboyantly dressed houseguests can do the same thing. So can letting in neighbors of a different race.

I guess I'm just the kind of person who believes that two consenting adults should be allowed to do whatever they like in the privacy of their own bedroom.