A year ago I wasted some time answering questions on Yahoo! Answers. It is a fun system that lets people ask questions and get answers from their peers. You can gain points if your answer is chosen as Best Answer by the person who asked the question, or else if it is voted as such by other members within a week.
For some reason I just got an email from Yahoo letting me know an answer I gave a year ago was voted as Best Answer. For your amusement, here is the mentioned question and my reply – apparently my answer was given close to my losing patience with the service:
They say sarcasm is the lowest form of wit – but they never tell you it will earn you credit points.