This thread has lost its way a bit because there has been a lot of arguing about what constitutes a stupid answer, as opposed to just a wrong one. I certainly think there is the odd post that definitely stretches the idea of "stupid" answer, and one or two posters are just posting things that are simply wrong answers. I rarely post on this thread now, even though it was me that got it going again last year when it had lain dormant for a month.
Anyway, last year on ITV's short lived Freeze Out quiz show, the question was, "Who commanded the English army at the Battle of Hastings."
Acceptable answer? King Harold.
Smartypants answer? Harold II or Harold Godwinson.
The actual answer given by the player was.. Napoleon.
I think that's pretty hard to beat. Alright at least Napoleon was a military commander, so there were more stupid answers that could have been given. Charles Dickens, perhaps. Henry Cooper. SpongeBob Squarepants.
But not much more stupid.