I'd like to throw out an idea for a hazard of S7, or future hc seasons. This is more of a funny "let's see what happens" type of deal, but I would like to see people struggling to play through ddo with friendly fire turned on. Sorcerers that usually clear a room with a couple of spells now also clear their party. Rangers with IPS shooting from the back now precisely shoot through their friends to hit their target. And bloody-minded barbarians decapitating their group members so they can heal via blood strength.
I think this would be highly entertaining.