Absolutely. I sometimes wonder about the really mean ones... and if they would say that to someone's face or they're just tough anonymously. I'd love just 5 mins with a few of them, personally!
As for the "duh" question, I totally disagree with the statement about the one that is not asked.
A question that you ALREADY know the answer to or the answer is so overly obvious, is a "duh" question. Asking it puts a target on your back that people LOVE taking a shot at. It's human nature. Being the mother of a teenager leaves you open to MANY "duh" questions...
Anyone who comes to the DIS should be aware of them but we get a newbie everyday and there we go.
My motto... Better to remain silent and be thought a fool, than to open your mouth (or post on the DIS) and remove all doubt.
"duh" questions remove ALL doubt.