Why does WikiAnswers allow inappropriate answers?

Please keep in mind that WikiAnswers is a wiki Q&A, and as such, anyone can edit answers, questions, alternates, and whatnot (Guests can only answer questions/edit answers to questions.).
There are several reasons why people would write inappropriate answers, most of them being vandalism.

However, Supers and non-Supers alike are working hard to warn and rid of vandals, as well to clean up the site.