Every wiki needs policies of some kind to function properly and to not fall into chaos. Yet wikis do their policies in different ways. From short guidelines on the front page to pages of policies written out in full detail and everything in between. What kind of policies do your wikis have? Do you have a detailed, wordy description of every one, or do you prefer to follow the K.I.S.S. method (Keep It Simple, Stupid!)? Do you prefer to have lots of rules that are well laid out, or do you prefer having people use their common sense to decide what is write and wrong? Have you even thought much about it? How has this helped your wiki do you think? Would you recommend it to other answers wikis?