For me I recognize it all as fiction. So when I watch something like Game of Thrones I have no reason to feel any conviction because I could recreate a similar story using biblical parallels.
A study of how the mind works tells us we have a sort of filter that we develop as we accept the principles that guide our life, but TV has opposing principles to God's principles that is being constantly pounded into the group mind. Children haven't developed these filters, so each generation of children fed on these things become progressively opposed to the principles of the Lord.
Even our educational programs for children are based on excitement, not on quiet learning and faith.