I'd have to read the actual email from Noble to get a handle on this issue, but at face value it doesn't seem to make much sense. Playing simultaneously on different sites is "collusion"? If that's true, then half the players on the internet are guilty. The very definition of collusion is teamwork between players, or between a player and the poker site
, in order to create an unfair advantage. If you and two of your buddies sit down at a ring game on Noble with your cell phones in hand or your instant messengers running and tell each other what your cards are, THAT'S collusion. How does what is described in the original post meet that standard?