Wikipedia is a non-market form of activity—it’s a $3bn hole in the advertising world. Paul Mason.
Students are (or at least until recently) told not to use Wikipedia as a source. I really don’t understand why not. Of course, there are errors, but then there are lots of errors in books, too. And as for the peer reviewed literature, well just look at the publications on homeopathy and other drivel. But more, the admission of error, is part of the discipline that underlines citation. So, being told to not use Wikipedia, is positively harmful. [direct link to this aside]