I definitely vote -no- to using a worn controller that gives the player an advantage, because as bertin has pointed out it's pretty much the same as using a modded game controller. Bash me if you will, but I also believe that spoon, pencil and rubber band tricks should also be banned from the competition, as the player is using an external item to again give them a gameplay advantage, items that are not part of the game controller. I know this sounds daft, but a player with a spoon, rubber band or pencil can have the upper hand on a player who doesn't. Using one's fingernail is a debatable issue, but (here goes...) I think this should also be banned as (this sounds stupid but) players with longer fingernails have an advantage over players without. It's not a part of the game controller, and, in my opinion, should thereby be made illegal. As you can see I have quite strong and strict opinions on the issue, but I think the competition should be made as fair to all the competitors as possible, and that means eradicating these sorts of allowances that give players the upper hand on each other. These are just my personal opinions on the matter.