I‘m guessing for now all this data is functionally useless since there is too much of it and you can‘t really differentiate between shit poster and actual threat.

What I wonder though, if eventually some AI could predict future behaviour, like say they fed it digital footprints of those that go ahead and do something, could it spot those similar?

Well, I hope I‘ll be dead by then cause I don‘t want to see the future police states at work, it‘s bad enough as it is.