I personally don't see a problem with them but its not my land. As far as a road hazard that maybe true but if your that afraid, don't put your keys in the ign and find a bubble to live in because if the horses don't get you something else will.
Maybe the reclamation could move to a more hardy type of grasses say maybe in the lines of some pasture seeds mixed in???
How hard is it to gather some of them up..As the you tube video shows these horses are walking up to the sightseers? Don't appear to act like a truly wild animal to me but I know nothing of Horses.
I think its preety kewl and hopefully they move on to a mountain where they will be liked