"Databases of offenders" is different from "database of people who haven't yet done anything but statistically we think might". I could be reading it wrong, but

"Databases of offenders" is different from "database of people who haven't yet done anything but statistically we think might". I could be reading it wrong, but it sounded to me like the parent comment was talking about predicting people who might post such videos _before_ they did. I don't think you'd need to theorize about using data science to ban people after they post some number of violating videos.