Oh yeah, it's a huge treasure trove for marketing to target people and learn about habits. I am suspicious like you, healthy paranoia, but I think the way to a more trusting "trustless-technology" based accountability is important to get people free from being dependent on what a centralized authority or media says is "real".
I don't like being filmed, but I would accept this as a beneficial directions towards freeing humanity. None of this would be required if we all learned how to think and recognize right from wrong and learn more about how to figure that out as we live. If people understood how to live without government in anarchy then rules could be upheld because they wanted to. But people aren't there. So I think technology can help bring us to a better place, or maybe it won't and we're fucked. lol.
It's always safe to assume we are fucked even if it's going to be just partially :P It's not only our paranoia and attachment to privacy (reasonable or unreasonable as they might be), it's also the fact that the authorities are not too likely to relinquish that power that easily. Whatever the technology, I'm sure the government would do its best to stay in control of it for both self-serving and possibly legitimate reasons.
But despite my partially irrational attitude and knee-jerk reaction to this idea, I can in no way deny it's utility in achieving the goal you have proposed for it. Sure, it will have side-effects, but its potential effectiveness is out of the question, at least in my book.