With respect to valet parking—
I agree- Under very limited conditions will I let someone valet my car. To much personal information can be gotten...
I will not frequent any place that requires valet parking. Where the place has an event I need to go to such as a wedding, I will drop off my SO, and drive to a parking spot off premises. If that's not possible (almost always possible although may require a walk and it's a pain in inclement weather) when I check the place out beforehand I ask if I can tip the valet to allow me to park my car.
Also, if you rent a car, there will be a clause in the rental agreement requiring you to listing those people who are authorized to operate the vehicle. The rental agent will check those people's drivers license when you check in. If the guy doing the valet parking damages your car (I once saw a valet guy accidently smash a car into a support girder) I would think you are on the hook for the damages when you turn the car in whether or not you have rental issuance. You agree to this when you sign the agreement and the rental firm has your credit card #.
If you choose to let some stranger park your vehicle you should use the valet key that every car has ( at least every one that I owned), and lock any personal info, garage door opener, spare cash you keep in the car, etc. in the locked glove box. The valet key will only start the car. One of the cars I had allowed me to lock the trunk release and the valet key would not unlock it nor unlock the trunk from the outside.
To quote my favorite author Joseph Heller — 'Just because you're
paranoid doesn't mean they aren't after you.'
(the movie, Catch 22, was no where nearly as good as the book) — if any of you guys haven't read it, please do —it is as relevant today (maybe more so) as it was 60 years ago.