I haven't looked into this guy, but what does anyone have against mountain bikers? Is it a trail damage on public lands kind of thing? Lame…they should put that effort towards ATV/snowmobile rednecks.
That's exactly the kind of attitude that's the problem. It is extremely common to have "level of technology" conflicts between wildland recreation users. Your intolerant attitude toward ATV and snowmobile users is exactly the same as Vandeman's attitude toward Mt. Bikers.
Everyone needs a place to enjoy their recreational activity. Some activities require separate areas, others are more conducive to shared use trails. Marginalizing groups only leads to increased conflict because of illegal use.