I'm a bit late to the party here, but my biggest pet peeves are the ever-changing requirements and the occasional emperor wannabe on here: "Your solution doesn't work for me. You are obviously a moron. Let us ignore the fact that I can't solve it, either, and came to you for help. Does anyone on this miserable site have a brain?"

One of my favorite types to watch and least favorite to get involved with are the types who ask the same questions in different threads over and over. I think it was a year or year and a half ago, we had someone who kept asking for ways to predict random numbers in Excel, completely sure that it was possible and that we were all a bunch of nitwits for not being able to figure it out. Anyone remember those threads?