Back in 1981 a couple black girls at my high school dressed as Klansmen for Halloween. Everyone thought it was hilarious. No one would dare do something like that nowadays.
It’s not something I did, but my first grade teacher used to give birthday spankings (long after the real thing had been outlawed in school). I imagine she’d face all kinds of backslash today.
At one of the colleges I attended, we could smoke in class at least until 1976. At a CC I worked at, we could smoke right outside of the classroom until 1988.
At our high school, we had a designated smoking area for students, at least until 1975.