Wait one sec, UM NO. It is NOT alright to have a wide open Dirt bike!
Unless you visit, smell, hear, and see a forest, how can you have any love to protect it? People are increasingly more detached from nature.
What is the name of that organization? "Tread Lightly"? I as a hiker really don't want to hear your ignorant open exhaust in the woods! Not only do you disturb other peoples peace and quite, you also desturb the precious habitat! But those DAMNED snowmobile riders(snowmachine if your in Alaska(?)) are more damaging to the enviroment than dirt bikes, ATV's and horseback riders, they pollute and when the snow melts, OMG a mess, trails loaded with trash!
There are three issues here; trash, noise and trail damage. I think both hikers and atv/snowmobile riders leave garbage but in my personal experience people out in the woods on a gas powered machine are less careful with the environment. I've never seen a hiker throw a beer bottle over his shoulder while walking through the woods but I have seen a few ATV drivers do it.
However, i think they need to follow courtesy guidelines about garbage, oil leaks, and not cutting new trails or widening existing ones. Unfortunately persons who participate in such a sport are unlikely to have much of a conscience. I'm sure the wild animals don't want to hear your loud exhaust either, not to mention that ATV's and Dirt bikes are a cause of erosion to the landscape.
I'm sure some people love the noise as part of the experience. If they stick to places with wide trails approved for their use and respect the land around it, I see little problem with it.
While dirt bikers and ATV fanatics can brag online all they want about how nice they are on the trail they are generally rude, loud, polluting, smelly and personally obnoxious. For every rider that stays on the trail and does volunteer trial maintenance there are dozens that leave beer bottles, chip bags and shell casings scattered across the landscape. That is when they aren't chasing hikers and horsemen off the trail with their high speed antics.
The planet cannot afford motorized sports any longer, it's time they were phased out and shut down. Even to get to the trailhead requires that you use large trucks and trailers wasting far more fuel than hikers that can get there in a Geo Metro. It would be nice if the guy in my neighborhood who tows his rock crawler with his Hummer scrapped them both and got himself some nice hiking shoes.
Climate change is real and you don't have to believe in it; it believes in YOU. Ask the people of Atlanta or Australia how nice things are when the planet doesn't like you any more.
There are some NICE trails near my house, on PRIVATE land, "NO TRESSPASSING" signs don't keep the kids off the trails. I'ved hiked these trails many times, yeah I KNOW first hand of land abuse!