This mountain bike rider is definitely ill informed. Lets see... the four inches of dirt you need for your bike is tearing up the environment....well, what does he think will happen when the four wheelers find his trail? And that is nothing if you have ever seen what happens when a bunch of 4X4 jeeps get together... Careful here! Dont bash the 4 wheelers. Notice how you point to quads and Jeeps as being worse? As far as the mt biker is concerend, its quads, jeeps and motorcycles, they are all worse in his eyes. Dont throw the quads and Jeepers to the wolves, because when they are gone, they will come after your 2 wheels next! And who will be there to defend your interest when all the others are gone? No one!