"Bicycles pollute wilderness areas... and damage minimalist trails that only feet should touch"  

"Whose feet?" I would ask?

Backpacking in the Cabinet Mtn. Wilderness in Montana I was run off a thin trail by a 20 horse pack train carrying dudes and their fancy elk hunting camp into the high country. Even a half dozen lamas in thin soiled places like the Kalmiopsis Wilderness or the Golden Trout Wilderness can trash fragile trails. Horses, mules, lamas and other "legal" pack animals leave wormy piles of dung on trails, or worse, by waters edge, for biting flies to settle on while waiting for luckless backpackers.

During many wilderness wildfire events, mechanized equipment and chemical fire retardants, far more intrusive than bicycles, are used with horrific results.

As a wilderness user, I see bikes as comparatively small potatoes.

How are we doing with making fire suppression, fire retardants, and mechanized fire fighting equipment completely illegal in wilderness areas?