People give it more credit than it deserves. It's a fan-made document, not anything official, and as such, holds no credibility whatsoever. Not to mention wikipedias are prone to misinformation (but then again, so do official sources).
And then there are the Edit Wars...
Although this leads to a question - which is more likely to carry misinformation: major articles, where vandals are more likely to visit, or minor stubs, where it may often remain uncorrected?