About 30% of my guests (not tenants) are new to Airbnb @Whitney274
However I vet all guests to make sure they are a good fit for my listing.
if a guest is arriving early morning I suggest they book the night before so the listing is available when they arrive .
if they prefer not to I direct them to left luggage facilities in my city .
I confirm to guests that listings are cleaned on arrival and not during their stay unless longer term bookings which are cleaned for nightly.
i don't see these guests as spammers but guests who don't read the listing.