The scary part isn't a single camera, it's the aggregation
My concerns are the decision makers may rake the wrong lesson from this, my own moral injury, and/or legal exposure when this information is inevitably used to harm someone. Also, Law enforcement would happily co-opt this service. Perhaps making the searches themselves public would alleviate same of the challenges.
My system would have been much more open on purpose. Like the private bittorrent tracker of security cams. You stream footage to the centralized cloud for aggregation, and get access to the full dataset in return. Perhaps with some "ratios" built in to incentivize sharing like you do for seeders vs. leechers on the BT network.
It's a fascinating technical problem - but the legal minefield is crazy even if you're doing it as a form of protest.
I also think the lessons would be lost on the general public. If anything, it would result in laws that made such things only legal for private licensed companies or some such - I'd simply be assisting in furthering regulatory capture.
Recording in places where there is no expectations of privacy is legal, and it would be very useful to establish case law that establishes that scaling up can impugn privacy. I selfishly don't want to be a defendant since I can't afford it, but if I won the lottery jackpot, this is what I'd be working on.