Dirt bikes are great...nothing quite like being on a designated hiking trail, ejoying nature when some guy comes up on and exrtemely loud and smelly dirtbike. In fact, I really love how the exhaust fumes subtly mix with the nice outdoor scents. And what kind of crazy person doesn't like loud, high pitched whines?

Sarcasm aside, there's nothing worse than being out somewhere nice and having one of these things (or worse, a convoy) drive by. It's even worse when the trail specifically forbids dirtbikes, and they come anyway. Even on trails where they aren't prohibited, they are still quite loud, and dangerous to pedestrian traffic on the narrow trails.