* Massachusetts' RMV AFAICT resells one's data, resulting in new car purchasers receiving a huge amount of fraud in their mail. It can be difficult to distinguish what is a legitimate correspondence from the dealership vs. what isn't, as the fraud mail does not clearly identify itself. (And in fact, that's the tell.)

* My Subaru runs ads for Sirius XM. (Ad, on the infotainment screen. While the car's in motion.) I did not pay for my car to run ads, obviously, and obviously that was never mentioned by the dealer, ever, before or after purchase.