That constitutes a drive by- for sure. Do you live close by?
Stick to your house policy! Good work!
We just had someone try to book (1 guest for our whole house 4bd/4bth listing) and they asked for exterior pics. I told them this was our private home and we don't share that to non-guests (subtext you're not going to stay here creeper). I also introduced them to AirBnB and encouraged them to share a bit about themselves (number of guests). They responded (4 guests and for a wedding) and questioned our high deposit.
The high desposit works to weed out people! Even if is a pain to deal with AirBnB to resolve issues.
Feel free to send them a special offer with an outrageously high fee- they'll likely get the hint.
-Special offer for extra guests and Party fee-" $500+ per night, does not include any fees to cover damages to property from party, guest will be responsible for all damages and extra cleaning", or whatever you think will push them to their senses.
Keep us posted and best of luck!