I think you might be on to something, but I think it could be expanded out to parenting in general. I think that states (in part through the educational system) have limited how we (and by we i mean everyone with kids... I made sure not to have any cuz i'm selfish like that) raise our children. In the late 60's my 1st grade teacher, some old lady in her 50's or 60's, would take us out into the hallway... Grab a handful of hair at the top of our heads, and shake the living shit out of us for 5 or 10 seconds to discipline us. I don't remember what I did to get that, but 45 years later I remember it and I doubt if i did what ever it was again. In the 70's I remember being paddled by several grade school principles for acting out. The Dean of Boy's at our Junior High School, who was this huge black guy that played professional football for the Vikings at one point in time, paddled me once for fighting. You better believe I remembered it. By today's standards each incident would probably be viewed as child abuse, and I can't imagine my 1st grade teacher would't wind up all over CNN and land in jail by today's standards.
After the schools stopped corporal punishment, they went on the lookout for child abuse in the home. With state child protective services backing the schools up, physically punishing children became a jail-able offense and all but stopped in the late 80's. I'm not saying child abuse isn't a horrible offense or shouldn't be punished, but I can't remember the last time I heared a friend say they even spanked their child for acting out. I mean everyone's more worried about being charged with a crime than disciplining their children and they all want to "talk it out" or give the kids "time out's".
I saw a youtube video the other day of some 9-ish year old kid that was completely out of control and terrorizing his mother at some clothing store. He was having a meltdown and hitting & kicking her while calling her a "fucking bitch". Instead of bringing down the hammer on the lil brat, she spent most of the video pleading and begging for him to stop. When he didn't, she sort of wrestled him to the ground, and gave him "hugs" till he stopped. Which he hadn't by the time the video ended, and was still going strong kicking his mother and calling her names. If I acted like that in public... My parents would have immediately knocked the shit out of me on the spot. I think anyone that grew up in the 60's would tell you the other adults during that time frame would have praised and supported her for it too.
My dad use to love to tell the story of the first time my mother heard me use the word "fuck". I was in 2nd grade and she overheard me use it with a friend. My dad use to laugh at the mental picture of me hauling ass down the street in sheer terror as my mother came running out of the house. I also remember a grade school friend of mine telling me his father backhanded him so hard he flew out of the dinning room chair because he wouldn't take his elbows off the table. While punishments might have been harsh pre-1980's... They insured we considered those around us. I won't say me or my friends were angles by any stretch of the imagination... But we were respectful to adults and knew our place and went a long way towards how we behaved as adults.