I bet this will be used by the FBI in the short term. They secretly track cars. A camera in the car would make this even easier.
I used to think the only way of protesting was not using the particular product, but that's not happening. Homedepot takes my picture when I buy a bolt.(BTY--it's Internsl theft. Treat your employees better and everyone up to the store managers will stop stealing?)
My only form of protection is filming them too. In this case, I'm just talking about cops. I use front and rear cameras on my vechicles. When walking I bring a smart phone and make sure I have the video app accessible.