The lack of basic respect is the root of the behavior issue, and we learn about that core value from our PARENTS.
I wouldn't have known simple manners if my parents hadn't taught me. Luckily, my parents had time to spend with me, talk to me, and teach me to use my brain! Yes, they both worked their jobs until they were utterly exhausted every single day, but I was still their priority. I got my butt spanked more than just a few times, and as an adult, I thank them for caring about my discipline. They often told me, "this hurts me more than it hurts you!" Has anyone had that precursory a$$-whipping apology?
I would also like to add that we had dinner together at the table every single night. My parents were INVOLVED. I rarely was allowed to watch tv, unless it was 30 minutes before bed. Nintendo was a serious treat.
I believe that parenting has become the real issue, and I am doing my part as a parent to make sure my core values are passed on to my child. He recognizes the appalling behavior of his peers, and society in general, and often points out "how wrong" it is. I'm fortunate to have a kid who actually listens, and I often thank him for being so conscientious!