I don't think the "bad old days" were always like you describe. When I was about 10-11, around 1960, in New Zealand, I went to yoga classes led by a guy who was also a scoutmaster and a sunday school teacher. We kids had pretty good idea what his interest in leading all those activities was, confirmed by him getting a two-year prison stretch for indecent assault on a child. I don't know what the incident that got him locked up was, but the stuff we could observe (like peering inside kids' shorts while adjusting their postures in headstands) was more comical than threatening. It was no big unspeakable secret, anyway.

He was in fact a very good yoga teacher.