Why are no badguy characters allowed?

The reason for this is similar to the reason why we had to come up with the Power level system for all characters. Certain people seem to believe that being a badguy automatically makes them immune to getting hurt by the other players and that they're all-powerful or that the RPG's rules don't apply to them anymore. Thus, we've drawn a hard line and do not allow badguy characters anymore to save us trouble in the future from these nitwit players. In the two-plus years we've been running this RPG we have never seen one person who can handle the correct characterization of any "badguy" so don't even bother us about it as you'll just get shot down painfully about it.