In the US it's not uncommon to get on the wrong side of a police officer for some personal beef, and the police officer begins to harass you using legal tools provided to them.

It's also not uncommon for police officers to use their tools to stalk women.

Now we're given the same untrustworthy officers full profiles of an individuals travel history without a "need to know". If you can't see how that's dangerous, I don't know what to tell you. In the US if someone is threatening your life, you can typically shoot them if you're out of options. You usually can't do that with an officer, even if they're off duty. The rest of the cops will stand behind that thin blue line and harass you.