IMO, they missed one of the most dangerous and prevalent parenting blunders...

7 Things 'Good Parents' Do (That Screw Up Kids For Life) | Cracked.com: The one I'm surprised to see not listed is 'leaving your child with a youth pastor'. Go ahead, google "youth pastor arrested", or something along those lines, and see if you don't notice a pattern. Also, using brain-washing techniques to perform religious indoctrination on children probably deserves a mention.