I'm stunned with the rise of Wikipedia, although I shouldn't be. The Great Unwashed got that nickname for a reason. People generally don't understand why an encyclopedia "anyone can edit" is a terrible idea. I've discussed this before here.
The latest, from the BBC, says that 90% of Wikipedia's medical articles contain information inconsistent with the latest research. Also, around 70% of doctors and med students use Wikipedia. Good luck with that.