It used to be urban legends, and I'm not talking like Bloody Mary stuff. I'm talking about relatives at the dinner table saying "Did you hear they did carbon dating on a chicken bone and it said it was millions of years old. Guess that disproves evolution!" and when pressed for a source, well, they heard it from someone. But now with Facebook we're exposed to so much more of it, and so much of it is crafted to mislead.

We all went through those lessons in high school, but for a lot of people they just didn't sink in. And they still don't. Talk to a high school teacher about how their students use Wikipedia.