From these replies, one would think it's never been done before. That's nonsense, as is the suggestion that it's 'better' to have multiple profiles for the game. Never having had to do this, I ask why should I have to, when this whole thing should not even be an issue.
To Raze I say they should copy the system Hellgate: London followed. Or any of the early Diablo's. Or any game that had single player/coop options. This is the first game of it's kind that this was an issue. Seems like quite an oversight.
Again, huge flaw.