There are various reasons for this, the main one being that you have to add a new entry for each of the following: "shit", "Shit", "shitty", "Shitty", "shitface" "Shitface" etc etc (it's case sensitive and all that) and it was too much bother to go through ALL of them and think of witty alternatives.
Just try not to be too nasty to each other now ... you bastards
