I'm hoping it's just because it was Halloween for the knife thing (not that that's an excuse at all, but people do stupid s--- all the time on Halloween). This trail is a major commuter route for cyclists, but goes through some rough-er neighborhoods (of course, the indecent exposure has been happening in the "better" areas....go figure).

We went through some of this a few years ago. It went away. I'm sad it's back.