Me & DH keep getting in fights because I have told him numerous times I do not want my kids (under 10) watching scary movies that even I as an adult find scary. Another reason is I have strong Christian beliefs and I also believe that movies like that have bad spiritual energy attached and it makes people feel a certain way.
My oldest gets scared of the dark, and can't sleep alone. I am sure some of these have come from being exposed to things kids don't need to be exposed to.