@François1216 Tons of hosts have been reporting both scam and demanding and entitled inquiries and booking requests since COVID close-downs. I guess guests think hosts are desperate for bookings right now and will take anything they can get.
Airbnb CS is difficult to get responses from in the current situation, but if I were you, I'd first decline the request (but if it's an inquiry, as opposed to a request, you don't need to either pre-approve or decline- simply messaging back once to each new inquiry fulfils your obligation), report this user by flagging their account and then try to get in touch with CS to explain what this user is doing (ignoring requests for information, refusing to complete their profile, sending you a barrage of requests), and asking them to block this user from contacting you further