Umm... Back when I was "on a school bus" or in a "school yard", and this was thirty+ years ago, the language in use was just as bad. And not because we heard it on "Walkmans". Kids learned it from other kids, just as they learned how to play Kick the Can, and the lyrics to "Jingle Bells, Santa Smells", as it has been since the dawn of man.
I'm a little older than you, and the language certainly was NOT as bad in my day. J.J. is closer to my age than yours because I remember him on TV when I was about 25.