Paranoia of Wikipedia?

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 195.89.26.53 made a change that looks suspicious, but 216.192.4.32 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)