What is most annoying, is that the Question Spawner actually believes that he/she has answered your original question.
A Question Spawner is able to magnify the confusion of any given situation exponentially -- especially in large group settings.
"Do you know when Bill is going to be back from vacation?"
"Have you heard whether we are going to release the product into China?"
"Do you know what the advertising budget for this project?"
You again...."Joe, when will you be done with the project?"