From an AP story by Dasha Litvinova headlined “The cyber gulag: How Russia tracks, censors and control its citizens”:

TALLINN, Estonia — When Yekaterina Maksimova can’t afford to be late, the journalist and activist avoids taking the Moscow subway, even though it’s probably the most efficient route.

That’s because she’s been detained five times in the past year, thanks to the system’s pervasive security cameras with facial recognition. She says police would tell her the cameras “reacted” to her — although they often seemed not to understand why, and would let her go after a few hours.