What is (to YOU) the most useless kick you have been taught, have seen, or know will be taught to you. WHY
Oh see, now this is an easy one. It would be the "snake kick".
Now since most people have never heard of such a thing when I have spoken of this before, please allow me to descibe a "snake kick" as it was taught to my daughter many years ago. Please feel free to follow along at home.
From a fighting position, raise your front leg so that your thigh is horizontal to the ground and your calf is vertical (IE, not chambere for a kick).
Now, from your knee down, swing your calf left to right like a pendulum.
Assuming you are working with your right leg here, now when you foot is as far left as you can take it, begin a kick towards an opponant that is in front of you, as if you are going to kick the right side of their chest. Then as you are kicking you will make sort of a backwards S motion and bringing your leg back to your right, their left while continuing to lift higher then back to your left, ultimately kicking your opponent in the left side of their head.
How's that for not only useless, but dangerous as well unless you don't really care much about doing serious damage to your knees.
Shortly before we left our 1st dojang, where my daughter was taught this kick, we were at a compeititon. I was coaching her, because quite frankly by this point I had a much better grasp of Olympic style sparring than did any of her instructors from this school. They all kinda chuckled at me when I sat down in the coaches chair, but they all stood around the ring to watch her fight. She destroyed her opponent with a final score of something along the lines of 15-2 or something like that. When the fight was over, the only thing any of her instuctors had to say was "That wasn't bad, but I noticed she didn't even do 1 snake kick."
Within 2 months we had found a new school.