I just put a dashcam in my truck, for insurance and "just because".
I do have a question for the professional paranoid here though:
My dashcam has a second camera, supposedly for a rear view. Currently that camera is in the cab while I think about it. I could put it in the rear window facing aft. Or I could put it over on the passenger side facing port. Recording, say, anyone I might be talking to through the driver side window. It's FOV is good enough at that angle it would capture everything from the seat and center console to the top of the window.
What do you guys think? I will likely never need a recording, but which view would you rather have and not need?