The fact that cops would want to be aware of people using the Dark Web doesn't seem particularly surprising or alarming. When you're looking for bad actors you

The fact that cops would want to be aware of people using the Dark Web doesn't seem particularly surprising or alarming. When you're looking for bad actors you build up a profile based on previous bad actors. I used to work in fraud prevention, and we found, for example, for our particular product if someone opened an account and then changed addresses within two weeks, there was a pretty good chance it was identity fraud. Of course there's nothing nefarious about opening an account two weeks before you move to a new place, but it would get you looked at because so many people who did were fraudsters. The goofy thing about this story is the fact that they circulated a leaflet listing something like this as suspicious behavior. They're going to get buried under bogus tips from nosy neighbors as actual terrorists avoid doing this kind of stuff publicly.