Not me personally - I can remember in the mid to late '80s, I flew regularly from London to Glasgow & back. Being young and fit, I was either given a seat at the emergency exit or the front row, both more leg room. There was obviously a note on the computer that I had been spoken to about how to manage the exit & also, if I was not required for that seat, would I "escort" a lone child. Said children were brought onto the plane by the stewardess, often having been escorted by them through the airport from a different flight. My job was to keep an eye on them, keep them busy if nervous etc. Never needed to do anything except chat, as they had often come long haul solo & were now on the home leg, having more flying hours than me. I think it was also to keep them from pestering the stewardesses on a short flight, not that they did. Most were in the 10 to 14 age range.