If banning something from being used in the game makes the game an overall, more competitive, and more enjoyable game (general consensus), and if this game was only held back by that thing that will get banned, then I'm all for banning it.If it's in the game it's in the game.
The double MK ban seems pretty scrubby to me.
I don't get it, though. Why ban double MK? I thought people were all about how "if the japanese can do it, so can we! Don't ban him!" a number of months ago. Unless doubles is just an 'us' thing, I don't see how this is any different.