When I let people sit in my 2016 Dodge Viper ACR or 2014 Viper GTS I don't care if they adjust the seat as it easily adjusts back to my preferred position. If you're that much of a prick that someone moves your seat I wouldn't associate with you anyways and wouldn't come near your car.
I'm a very generous person and I've found monumental success in life by being open and generous (not driving my cars but letting someone sit in it is inconsequential to me) that I can tell very quickly if your a dick and a couple of pricks on here can only make me laugh.
I wanted to give you another opposing point of view using a real scenario I have been witness to.