@Neill23
I recently was flooded with new accounts, ofcours not yet having reviews, but also not proper verified (for me it means: havng ID verified). So just start the conversation, state you do not accept bookings anyway without ID verification and learn from the responses.
If somebody already in the intial message shows off not having completely read the listing or asking for (more) discount on short stays, it is a bad sign. And non-reponsive people start already with a not-5-stars-on-communication !
To prevent to much declining, ask them to retract the booking request. If it is an inquiry, no obligation to decline, just answer the question.