I was wearing a seatbelt when this happened:
EMTs told me on the ride to the hospital that they thought it was a fatality when they rolled up. Instead they found me standing next to the car wondering why the base of my skull hurt so bad. No broken bones, but to this day I get headaches in that spot if I get stressed.
Without the seat belt, I would have been projected through the windshield and out of the vehicle. If you look, you will notice that the passenger front tire is sitting on an 10" rim -- that's to keep the car stable on flat ground because the chassis was warped by the impact.
Having said that, I consider most PSAs about tickets to be a PR move to justify fines in the mind of the public. If everybody thinks that not wearing seat belts is somehow bad (and it is, see above), then anybody stupid enough to not wear them SHOULD be stopped and fined. For my part I just figure they've earned whatever their stupidity brings them.