> The idea that someone may commit a crime based on things they are doing is abhorrent. It runs against the idea of innocent until proven guilty. That's nonsen

> The idea that someone may commit a crime based on things they are doing is abhorrent. It runs against the idea of innocent until proven guilty. That's nonsense, it has nothing to do with the presumption of innocence, that only comes into play at a trial. Law enforcement often looks at things that aren't crimes to predict crimes. An obvious example: people grooming minors online. It's totally legal to talk to a twelve-year-old on the internet. It's totally legal to meet twelve-year-olds you've talked to on the internet. But it's highly suspicious when you're 30, and if the police hears about it, they'll very much be interested in checking that out, even though you haven't committed any crimes yet. It's a different question whether these systems look at things that are strong predictors of criminal activity or not.