I think parents should take a close look at the books being marketed to their teens.
I am spending the summer reading teen fiction. I just finished The Gemma Doyle trilogy by Libba Bray, witchcraft, lesbianism, anti conservatism and capitalism.
The Bray books are targeted for 8th - 12th grade girls. No way would I hand these books to my daughter at that age.
When she was in 8th grade she was supposed to read The Color Purple. I told the teacher NO, my daughter would not be reading that garbage. The teacher told me that some girls my daughter knew at school probably came from backgrounds like that.