Society has always been running giant social experiments on the next generation. That's what a culture is.
For your non-technological items in your list, I don't see how public school, rock and roll, and desegregation are or were remotely related to experiments being ran on children by society.
Rock & roll -- millions of people thought that letting children listen to this African American music would corrupt their children and prove ruinous to children. Some parents demanded controls on access to this music, much as some parents are doing with Instagram today.
Desegregation -- it's well worth an hour of reading if you haven't spent the time so far. Here I will just say that it was obviously a profound change in social patterns, changes to the US's legal caste system, and had to be enforced at gunpoint. Nobody knew how it would play out, like nobody really knows how using Instagram at age 15 will impact people in midlife. This led to (white) parental outcry over the prospective changes, as many (white) parents did not want to participate in this social experiment.
Big changes, no real control groups, unpredictable outcomes. Experiments in a very real sense.
(the UK has no shortage of racism, but it was never legally enforced!)
Who ran the rock and roll experiment? That example makes no sense.
Public schools and desegregation were constructed to better society, not as some nefarious way for some corporation to improve their profit lines.