Much to your amazement, a lot of the NA melee community uses it, but not all as either people think it is an exploit or don't know what it is, and if they think it's an exploit, then they are entitled to that opinion. But you saying that it is banned on most servers is false, as all populated NA groupfighting/duel servers allow it because it is a part of many peoples melee styles. You can see the switch at the last second and can counter it, but it is somewhat difficult, but that doesn't mean it's impossible to block or chamber. Please don't call others ignorant, as it doesn't solve anything. Also, you saying that all servers disallow double-x us like saying that all servers use medium melee speed, which also is also untrue as you do not go on NA servers to groupfighr where they have the melee spotted set at fastest and not medium. Don't make accusations that you can't back up.
Also, I'm in my phone so there will be spelling mistakes. This message is directed towards Norseman as I can't quote on my old ass phone.