if a toll tag required me to power it and allow it to record video of the interior of my car at all times, then FUCK THAT NONSENSE!!!! even if they had it setup so that the camera was only turned on briefly by a signal as you approached and then turned off again as you passed the gates, that's still a hard no from me.
Uh you're over thinking it. They just have cameras in the toll booths that snap a photo when the car crosses the sensor.
uh, what about the kids sitting in the back rows that can't be seen?