I heard a speaker once say "that's a [obvious pause] question" and the audience giggled because it was obviously a really poorly thought out question.
I've used "please phrase your question in the form of a question" when the person in the audience is using it as a platform to deliver a long speech.
I've used "please phrase your question in the form of a question" when the person in the audience is using it as a platform to deliver a long speech.