Many of us have no problems with horses on the rail trails in the area (unpaved, limestone and some are just graded gravel or hardpack dirt).
Many of the horse owners have a device like dog walkers carry on a long extendable shaft and at the least they manage to push their responsibilities off the trail..
. Some don't..
. In return most of us will stop and dismount or ask permission to pass a horse/rider as the trails are only about 6 feet wide at best. There are some riders who just banzai past the horse........they do that to people too.
I've seen hoof prints appear in the trail.......they usually disappear within a day or so. Not so for wheel tracks though as they are continuous and are repeated in the same place every day.
Then there are the ATV's........banned from the trail but seem to show up after dark anyway. It would appear that their favorate game is to lock the brakes and dig holes with the rear wheels.
If you have paved trails though I could see where the horses are going to get excluded...not to mention that it is hard on the horses.