These have been in your cars for a few years now. I work for an Ins. Comp[any and we routinely access this info in cases that go to court. We've been able to convince more than a few plaintiff's attornies that maybe they didn't have a very good case.
I don't like them. I know it sounds paranoid but it won't be long before the things start including an electronic signature that activates any time the driver violates the speed limit and broadcasts an ID to the police.
Dittoes. See #9 above.