I do not support the idea of…

I do not support the idea of having trail horses wear poop bags. Most horsemen are responsible enough to make sure when their horses poop on the trail to make sure it is kicked off or spread around. It dries out quick enough and doesn’t continue to smell for a long time.
Wearing bags on horses would cause a lot bigger problem if it got spooked or caught on something. These bags are intended for carriage horses in cities, not trail horse in the forest.