Question: Have you ever given a SARCASTIC answer to a serious question, or a SERIOUS answer to a sarcastic question?? 

Answer: Most often a serious answer to what was probably a sarcastic question. Why not? Somebody might actually learn something new. :)\n\nBesides, it's good karma! (and 2 points...)
This question from the Yahoo Q&A forum is categorized in the topic: Society & Culture