[fphhotchips]

Also, every 10th truck probably has a guy with a shotgun in the back.

More to the point, I think if we're trying to secure the use case of "truck the same as it has been for 30 years gets a black box put in it" we're doing it wrong. After not too long you just flat out won't be able to get in, even if you do stop the truck from moving. You won't be able to drive it anywhere - what need is there for a cab on an auto-truck?