There is a fast spreading belief that immunization shots are a cause of autism in children. Many people on my wife's mom's forum would castigate her for telling them that this is a hoax and that there are numerous articles to disprove this. They would say things like "my first kid got immunized and he is now autistic whereas my second child didn't and she is fine." Sure, they are well-meaning people and you can parent your child however you wish, but if you're spreading misinformation to other parents you're putting their children's lives at risk.

Scary how many people can believe a lie and assume it to be true.