@Polly107 You can easily adjust your Calendar settings so that same-day availability is blocked by default. This option still enables you to selectively unblock on a date when you're fully prepared to accept a same-day booking.
You can also filter out a lot of the dodgy business by setting a Minimum Stay of more than 1 night. Not all hosts object to their properties being used as hookup locations for consenting adults, but it really comes down to how long of a booking is really worth all the time and effort you put into each turnover.
I'm not sure what kind of protection you feel your home requires, but one thing that's for sure is that Airbnb is not in the business of providing it. So, I would strongly discourage using exterior photos that would make the property identifiable from Google Maps, disable the "precise location" from the map settings, add some firm House Rules concerning things such as unregistered guests, and consider some security features such as external cameras (which must be disclosed in the listing).