Native Americans used this method I the northern states. It is really nothing new and it does work. I wouldn't use it not worried about getting shot here but because it is very effective. I would thing it would take some of the fun out of it. It does work though.
It does NOT take the fun out of it. Its more of an adrenaline rush when they can't figure out what is actually going on. They are coming to fight YOU not a decoy. Try it before you make a decision.