Pittsburgh folks don't usually check this, it seems, but I figured I'd post this here, just in case.

I had a run-in with this definitively crazy dude on Iron Grate trail there...a long story, but he's pretty off, and likely violent. He had blocked a section of the trail with big tree limbs, and was hanging out, waiting for someone to hit them; fortunately, he hadn't planned so well, and the section was easily seen from above. He may improve his tactics, though...

Other reports from riders said that he'd threatened them with an axe.

So, be warned. I already called Parks, and the cops. If you see him, do the same, please.