It really depends on who the parents are I think. I know I had an understanding with my parents. They loved me and respected me but never do anything to make them loose their respect or embarrass them. That included, drugs, sex, beligerant, cheating and many more things.
I think kids lash out these days because they see other kids do it and their parents don't give them enough respect as people. So they lash out in any way to get some form or attention...good or bad