Inaccuracy certainly is a problem on Wikipedia, but the attempts to solve said problem (by enforcing a policy of having to reference absolutely everything) have just made it even worse. I recently came across an article that was almost completely empty, but looking at the history it once covered the topic fairly comprehensively until one user took it upon himself to delete random unreferenced paragraphs and/or sentences (while leaving others), in a way that made the article somewhat nonsensical and quite frankly shit.

This person had himself written several articles that lacked a single reference, and if I was a petty man with fuck-all else to do I'd go and do the same to all of them. It was also quite obvious from his user page and edit history that he personally disliked the subject of the article, and was almost certainly doing what he did simply due to his own personal views rather than any desire to improve Wikipedia. But he was acting completely in accordance with the rules, so not only did he get away with it but he's still doing the same thing whenever anyone adds so much as a word to that article.