Imagine watching the past like you're watching TV through a Live Peep Cam feed that the subjects aren't aware of.
One where you can steer & record all their actions.
Talk about "Privacy Violations".
It'll also make most crime easily solvable.
Just rewind your Temporal Viewer to the moment the incident happened, you have all the evidence you need to prosecute.
That would greatly change the Criminal Justice System along with using Time Travel to prevent Crime from happening along with prosecuting those who would've succeeded, into those who failed at their attempt in crime.
For those who love a "Crime Free Society" where Law & Order ALWAYS WINS and Crime is truly prevented via Time Travel after the fact to fix the incident.
It would be "Paradise".
For those who like to commit crime, it would be "HELL brought forth into REALITY".
They would almost always be caught, crime would be INCREDIBLY hard to commit and get away with.
You would need multiple layers of smarts, technical know how, and the ability to make a crime happen without being observed or discovered.
That would be NEARLY IMPOSSIBLE.
I see no downsides for the average person with that.