@Marie5915 Could be scammers, could be people who can't provide references or credit history or whatever else is needed to rent a place on a traditional long term lease.
If these are sent as Inquiries ( make sure you understand the difference between a Request and an Inquiry), you don't need to click on decline (which lowers your Acceptance rate), with an Inquiry all you need to do is reply within 24 hours. Just tell the inquirer you don't take long term bookings or communicate with guests outside the platform.. Make sure you have a naximum stay length set on your listing.
And when someone asks to communicate outside the platform, or anything else that feels like a scam, report those by clicking on the "Report" flag.