The practice of using private parking spaces and leaving the handbreak off – to enable the attendant to get cars in and out. (a similar practice is common in Thailand. In South Korea far more likely to leave your phone number on the windshield).
And in a world of autonomous mobility, the rules that define how far your vehicle is comfortable straying from its defined location? Today if you hold the car keys, you (largely) own the rights to drive the car. Different keys for different levels of access. Or simply different levels of access.