As a child I recall aunties, uncles and grandparents smoking around me all the time with no ventilation. I'd stay at my grandparents for the weekend and go home with a cough, it was seen as normal.
Parents driving me to school hungover from the night before possibly still slightly drunk.
As an A level pupil in the early 2000s I recall staying until around 7pm one evening with 2 teachers to finish coursework due in the next day, the teachers practically did it for me and then one of them dropped me off home in her car, nobody batted an eyelid.
We had a French language assistant, who was actually French and she invited us to her home one Sunday to do coursework and eat croissants, again it was all above board, she was a lovely Mrs Doubtfire type lady and it was all fine but looking back, that'd never happen now!
Interested to hear from anyone else