Firstly, I'll just say that I am opposed to censorship, but age ratings, as a guideline, do have their place.
Secondly, what you want is unrealistic, and what you are doing is calling the vast majority of parents sh*t, not just some. I don't know if you have kids, but what you are expecting is for parents to do a days work, come home and do more work relating to family and the home and then find the time to screen everything their kids watch or play before allowing them to and somehow leave some family time? There's not enough hours in the day.