What's the most stupid question you've heard?
There I was in Debenhams department store yesterday, and I decided I would pop into their restaurant for some lunch.
One of the "girls" serving the food (looked like an Addams family reject), about 19 years old, and was probably in her first job.
There was a woman in front of me who asked her what the vegetarian choice was. At first, she looked totally lost, then turned to the chef and asked
"Is scampi a vegetable?",
and it was a serious question.