It's not as if Google or anyone else needs to go find the person and forcibly detain them. Google can steer people towards more ads or inject websites for treatment into the search result pages.

Also, the hue detection was triggering on people who clearly had temporary issues and could have been helped instead of subjugated. Some of them were far more interesting and "healthier" than the sheep, like Kogami. It's more of a problem if someone doesn't get angry about something like Kogami has.