Back about a year ago, I went riding with some guys from work. They were all perched on XR400s. We went to Hungry Valley (Gorman) and the quads were swarming like flys at a dog poop picnic. Anyway, we were way up on a trail, and out of nowhere, around a blind corner comes some twit on a quad, & nails the three bikes in front, and knocks them all off the trail, about 300 feet down, through rocks, bushes, etc. Took us ALL DAY to get the bikes back up on the trail, nothing happened to the jerk on the quad, he drove away like he was in a Buick or something...ban the quad, just like the industry did to 3 wheelers.