You should check out Who Pooped in the Park. It's another 11 at Muir that Andrew and I worked on. As with MumMum, there was much discussion about the grade.
Someone at Muir once tried to counter the soft ratings by knowingly sandbagging a route. To me that's just about as dumb as a soft rating. You just end up with a crag full of fucked up ratings instead of somewhat accurate.
Yo Ray jack dynomite! Listen to my beat box! Bew ch ch pff BEW ch ch pfff! Sweet!