Added to that horses are un-protectable, you can only really have them for showing off because if someone has fly and sees someone riding a horse they could attach a lead to the horse and fly away with the horse. Ecc is not the place for horses because you can't use them for anything without them being stolen.
This is exactly why I thought horses would not be added, or added with even more limitations than they currently have. To be honest, the most major aspect of horses is the breeding--whether anyone wants to believe it or not. It is all about the stats, the colors, and the markings; breeding for show, breeding for race, breeding for adventure, and opening markets in any economy-related environment... (i.e. they should be common, their own world or a way so they don't lag up the place (change breed time and growth time + feeding--not be stolen due to being common; switch out horse eggs for something else in voting.) Unless there comes a plugin that ECC can support, use, and that works fully well, I am all-for horse stealing being legal. We already get them invincible, which seems very nice. And it at least brings a sense of "excitement" for users and encourages users to build better stables and structures. All I know is that I had zero interest in horses when they were added, because I did not want to deal with the thefts or their high limitations. :/ People seem to be noticing this, too, and horse egg prices are going down and becoming "not as amazing as I thought." If this continues, you may not have to worry about thefts as much.
But what about people attaching leads to your horse while you ride it, swiggle? I haven't heard of a way to prevent that unless you use a 2nd person (inconvenient).