Anything that makes you laugh...
I'm not surprised this flash didn't get a high score, but have a problem with swallowing how it got to be "Turd of the Week" (though the irony is a nice touch).
It lacks depth, and is just there for the toilet humor. I got no problem with toilet humor personally, but I won't endorse it, either.
If your flash projects had more depth and variety per flash, then you might reach the big time. On the other hand, who wants to see a Sith Lord expel a spiky crap out of his ass and expect some kind of "Meaningful Dialogue" with his unwitting associate?
Don't mix intent with output, folks. Rate flash on their output, not intent. Just because you think toilet humor sucks doesn't mean the flash itself sucks--this one happens to be well put together, considering its limitations and premise.