I was thinking about it after having had some harsh answer to some comment or edit of a question. There are a lot of questions from new users (and some answer) that shows that the user has not really understood the philosophy of the site (using it like a chat-like site, for example).

Suggesting (or even requesting, but I am not sure about this) to read the site help and acquire the "Informed" badge when a user post a question/answer without having it would greatly enhance the visibility of the FAQ and the rules of the site, and maybe help in auto-filtering some of the duplicate/too short/impossible to understand questions we see every morning...