Why does everything on WikiAnswers that has nothing to do with clothing have a 'clothing' tag?

Well, obviously everything doesn't have a clothing tag that is non-clothing, but if you are seeing a lot of miscategorized things that are marked clothing, then you should recategorize them by using the "edit categories" link on the question page. If that doesn't show up for you, try flagging the question saying that it is in the wrong category.

We love it when people help us categorize questions correctly. :)