I think you'd be alright as long as you posted some sort of senseless stupidity. The DUmmies generally have the attention span of a young puppy. They don't really pay much attention to or remember our user names so they probably wouldn't notice. There are some exceptions. As Gipper said above, his name and Freeper's would surely cause trouble. Cavers like BEG, Bally (sometimes known at the DUmp as Cigarette Girl), frank, and a few others would immediately be noticed because various DUmmies have crushes on them.
As for the mole challenge, I'm trying to get clearance to post at least one more clue before tomorrow's deadline.