When Pat Ruddy pulled the "are you still beating your wife" line on me and he copped it from all quarters, I did feel a bit bad for him, because it's a remarkably common saying in some circles, but not others, so it seems to fire up those not familiar. let's not have a repeat of that blow-up.
It basically says "that's a question I can't answer without incriminating myself".
I agree with Michael Moore. Enough already.