Why do some parents insist on keeping their children in bubbles?

Why are parents over-paranoid about so many things? I can understand setting limits, because I have my own, but some folks really creep me out with their paranoia!

Example: A lady on Facebook was warning everyone to not let their kids see the movie Brave, because “the daughter has a witch put a curse on her mother, and the father tries to hurt the mother.” It’s simply not that black and white, and it’s a fabulous movie with a great, positive message. What the fuck is that woman’s problem?

If you bubble your children, you do them a disservice. I know, because all 7 of my cousins raised in a giant bubble by fanatical, paranoid parents are screwed in the head. Why prevent your children from experiencing life and asking difficult questions? If you keep them from asking those difficult questions, they will have no idea how to function in the “real world”.

As a child, I predicted my cousins would be messed up from being so over-protected, so why do so many adults fail to see that?