@Ewa63 Just to mention it, Airbnb now has a filter--I say "now has" because it was presented to us as a new feature when we started to list earlier this month--that you can add before guests try to book with you in which you specify that they must have "Recommendations from other hosts." If you have Instant Booking turned on, then they can still send you a tentative booking request, but it is up to you whether or not to accept.
We set that as a prerequisite for booking, along with specifying that guests must have a government ID, and we're really glad we did, because when our listing first appeared, we had a couple of dodgy-looking requests. One was from a young woman who said that she was planning on going with a group of friends to "have a good time" in our area. She had no Airbnb history, no government ID, and obviously, no recommendations from other hosts. So, we turned her down and don't regret that we did, despite it hurting our acceptance rate at the very beginning.
Anyway, it's good that you are aware that this sounds like a scammer. Thanks for mentioning it, and do think about what I've said here about adding some extra protective filters on if you are using Instant Booking.
Good luck!