you can have 2 death knights on one account
waste of time imo...its one thing to have more than one class IF you have only one account, but everyone here has at least 2 accounts. for the standard player that doesn't MB, they probably won't bother creating two DK's just to move one over and "beat the system" (if they even have more than one account, which most people don't bother with). and for some classes, i think it'd be a waste to have more than one of anyways (such as the DK). *shurg*