The trail/path where I usually ride is full of bikers, joggers, walkers and rollerbladers. Other than a run-in with a walker who allowed her dog to pull its lead all the way across the trail to sniff something and pee, and an idiot who thought the trail was the appropriate environment to learn to rollerblade backward, all of the rude and inappropriate behavior I've seen has been by cyclists, I'm sad to say. The trail is posted everywhere with ROW requirements. Rollerbladers are supposed to yield to everyone, and bikers are supposed to yield to pedestrians. But most of them don't seem to have a clue. And most of the time it's the "uniformed" road cyclists who misbehave, and typically at a speed in excess of the posted 20 MPH limit. More casual cyclists seem a lot nicer.