Now I am honestly confused as to what "Natural Horsemanship" is.
I've heard so many times that it involves desensitizing the horse to things by scaring them with it until they just don't care anymore...and I really wouldn't want that for my horse. That's not trust.
Trust is bonding with your horse to the point that if a "scary" plastic bag floats by his face in the wind, he'll look to your calm reaction for reassurance as to how HE should react. Honestly, that's what my horse and I have. I never waved things in front of his face or threw things around or what have you. We have a special bond and we trust each other. If something typically frightening to a horse happened, he would look to me for guidance as opposed to going off his rocker. A horse shouldn't be trained out of its natural instinct, it should learn how to trust its partner.
But that's just my two cents...or maybe I just spend too much time with my horse.
And a side note - I always think of something my farrier said whenever people talk about how they want their horses to live completely natural. "If you want your horse to live 100% naturally don't shoe them, don't blanket them, don't halter them, don't feed them, and take down your fences so they can roam free...because that is what's natural." I think it's a little harsh, but it gets the point across to some of the more ridiculous people.