I guess most people would use it, if they would have HKS. At least for camera and microphone … for a good reason.
Since a police (in civil) stopped me at 2:00 AM in an empty park, I don’t leave my house at night without turning phone into lock-down mode. I did nothing wrong and after they checked me (including bag), I could continue my way. There is a real chance that they came because of my cell-tower-movement (there are existing laws that allow this kind of surveillance). Is this “fear” irrational/paranoid? Maybe. Maybe not. Who knows? Does it hurt to use lock-down mode? Definitely not. But to know that it’s definitely no tracking makes me feeling much better and safer at night. The peace in mind is true.
And just an additional info: I don’t fear the police. I do nothing wrong. But who want to run into a control when you don’t even expect to see random people? It just feels bad.