Board Thread:Suggestions forum/@comment-26456694-20161030200412/@comment-26410366-20161031125153

If that's the problem, then tell the server staff. There should be rules against it. Otherwise, I suggest to put in some defences to kill horses that do that. Lava, quagmire, or hired archers around the walls should deter players from risking their horses. As Recneps said, those horses are rare, hard to find with and without third party mods. Look on the fort defense  tips page for other ideas.