What's your opinion on hobble training?

Last year at our states horse expo/Equifest we had Craig Cameron do a demo speech on them. He discussed how horses get caught in fences and struggle to get out causing them to get tangled and wounded worse than before. When they are trained for hobbles they automatically go into the mode of "It's just hobbles, I need to stand here and I will be fine". I realized then that it was so true. My horses have been tangled up before and it would have came in handy. It also would help if your horse took off by accident and got caught in anything such as a lead rope or reins. This could cause a broken leg if the horse isn't hobble trained. I believe it would be great for anyone on a trail ride as well. Say someone you are riding with needs your help(fallen off horse, bit by some animal, etc.) you can jump off your horse and hobble it while tending to that rider and horse or for really any reason you would need to guarantee your horse stays put. With the things I have seen I am fully for training a horse to be hobbled, I don't like when people abuse these training aids for things that only harm the horse but when it is used for the better it is great.