By now you've seen it: a video gone viral, "The Most Vicious Taekwon-Do Fight Ever."
All I could think when I saw it is that this is why people don't think that karate works.
Shoot, when I was training in TKD those many years ago and made it almost all the way to black belt, it wasn't worth much, but dadgummit, I did at least get to where I could hit pretty hard and mostly avoid being hit. I did successfully defend myself a few times. Now, it's a laugher for adults.
Nobody's ever going to think of Taekwon-do again without laughing, and it's the people that just had to make a sport out of it that let it happen.
Congratulations, guys, you've destroyed your art.