I agree that once a child has seen something they can not unsee it and it is in their head forever.
children are strang because what will scare one child will not bother another. Sometimes even tv cartoons will scare them even when the age rateing is u such as shrik where the dragon eats the bad knight at the end will worry my 2yo but scooby doo runing away from two ghost she will laugh her head off as dogs dont talk and they are just men dressed up like halloween!
I value my childrens innocence but relise that death and fear, fear of the dark, fear of the icecream van bell, fear of water or fear of thunder are a big part of life and needs to be teach how to over come it in a safe environment.
I do not leave 12 rated film in reach of my children, we only have four dvd rated 12 and they are in my room on the top shelf. If my ds wants to watch them its only with us and a scary pillow or we dont watch them.
We do not watch the news, eastenders or anything that is not peppa pig u rated and a cartoon when the children are awake. My ds can earn xbox time by reading, maths work, being helpful and good shareing with his sister.
My ds also plays football, roller hockey, goes swimming, plays tag, hide and seek, plays makebelive games with his friends and sister, read books, draws, paints and plays in the mud. He also plays on my phone, on the laptop, on inotab and the xbox and watches tv. He is a very activie, smart, kind and well rounded child.
Watching harry potter will not scar him but watching his disabled father deteriate and die from MD will, but I cant protect him from real life 