I have no problem with banning this tackling technique. It just looks dirty to me and I'm old school and always played to maim within the rules so to speak. It was just what football was in the 70's and 80's. I liked to hit hard and when I hit you I wanted you to remember it. That's just the way we all played the game. But swinging behind someone and trying to basically blow their knees out, that's not cool at all. It doesn't seem like a "natural" tackling technique, and teams I see as dirty tend to go to it ALOT. Specifically the Whiners. If they can get the definition down and make the call when it happens I'm ok with it at this time.