Questions such as "What's with all the "brony" nonsense? and vice versa, "Why do people hate "bronies"? I'm sick of hearing/seeing it, my friends are sick of hearing/seeing it, and probably about 95% of this website's community (mods included) are sick of hearing/seeing it. So yeah.
Oh, and the questions that are stated as a command such as "Recommend me a...". If people are seriously at a loss for interesting animes, books, movies, games, etc out there it never hurt to put in a search in Google. Or also the supposed "harmless" questions that can actually be invasive of privacy. Such as the "what do you wear to bed", or "what do you do at "x" in the morning"? Granted I haven't seen many of those pop up but I have seen quite a few to wonder what people create threads for anyway. It can't just be to seek for information unless they were a little kookie in their heads. But nevertheless I guess that's why we have aliases on the internet.