I don't really see them as any more dangerous than going to a house. I had my moments while on a car meet, Been left naked as the guy drove off, but I have had difficult clients in hotel rooms too.
Well if you're at a house then in theory your security buddy knows exactly where you are and where to send help if anything goes wrong and they don't hear from you, or at the very least you know exactly where you are if you have to exit in a hurry.
If some bloke decides to drive off to God knows where, nick your phone and ditch you at the side of the road you won't have a clue, and that's still a better outcome than being taken to some field or car park where his mates are all waiting, and in a car you can't stop or get out of. And there should be no need to be naked; if you have to do it wear a short skirt or dress which you can pull up and then down again.
I don't go to private residences either, that said