I think there's plenty of concerns about abuse, will they actually stick to the limits on use/retention that are supposed to be in place, how this relatively new company will safeguard the data, whether any long term pattern tracking is included (i.e. they could easily be deleting every photo after 30 days like they claim, but the information from the photo is retained elsewhere)

Plenty of people have plenty of reason to neither trust the police, nor the private company being given a tremendous amount of information. There's also a question of national organizations having access not subject to the same regulations as local police. No Such Agency and what not.

All that being said, I really don't care. I also think privacy is a dead concept and, while I love the heck out of the ACLU and send them money every year, they're like those Japanese soldiers on islands in the Pacific who don't realize they lost the war years ago. I admire their moxie, but the bell can't be un-rung and I think there's enough probable and likely benefits where this isn't the thing worth getting upset about with policing.