I remember as teenagers (late 70s early 80s) we used to use off color jokes and such. I don't think it was in a spirit of prejudice I had a couple black friends and never thought of them differently. My behavior was just being young and stupid. However I don't remember any adults having anything to say about it and they probably should have. As XBEHERE pointed out we certainly weren't acting any better than those non-double bags
I do remember my mom talking with me when she heard me use the N word and I'm pretty sure that was the last time I ever used it in that context. That was when I was really young and had no clue what it meant. (early mid 70s)