We have hand fed, not to teach respect, but to teach trust. We have used the method (successfully) for wild mustangs, and for rescued PMU mares who were not handled very much. It starts out with you sitting near their bucket of feed and every other feed, moving the bucket closer to your chair. Once they are eating comfortably right next to you, the next feed you grab a handful of grain and if they want to eat, they MUST take it from your hand. I'll feed aprox 1/2 a feeding that way. (then they can eat the rest with me sitting near them.) Continue this for a couple of weeks. I have not found them to get grabby or pushy at all. After they are successfully eating from your hand. Do this occasionally (every couple of weeks) to reinforce it. I think the reason some consider it a "respect" issue is because, essentially, when you are making them eat from your hand, you are controlling their feed. If you control the feed, then you are "above" them in the pecking order. Thus, respect.