I have met polite bikers recently. There are some kamikaze bikers. John Murray remarked that his main concern was erosion. A few yards from where I interviewed the Murrays there was an illegal bike ramp on the berm at the side of the Spring Trail. I prefer bikes to horses.
Horses leave droppings that attract flies.
Pretty soon you are smelling that instead of the fresh air. I couldn't be quite so relaxed if there were bikes. I would have to be more vigilant, watching out. I'm all for biking. But it's nice to have some spots for walking and running only.