Here is a fun argument that Richard Bejtlich brings to point Wikipedia flaws: "I would personally never use Wikipedia as a resource for any serious research. I might use it as a starting point, but why should I trust what it says? Am I going to go back through the editing history and note that 18.104.22.168 made a change that looks suspicious, but 22.214.171.124 seems more reliable? That is ridiculous."
Do you agree? Are there enough mechanisms in Wikipedia to assure the overall high level of content accuracy?
I see two scenarios for inaccurate content: a) obscure pieces that nobody bothered to check and b) articles where bigots in large numbers beat back the forces of reason (due to their smaller numbers)