I always remember on Child of our Time when they were at a neighbours house in their garden and the kids all started having a water fight. Some of the parents didn't want their dc to join in and Alison was genuinely bewildered as to why people would want to stop their children from having spontaneous and wholesome fun like that. Just in case they got wet.
It was just a small thing I only saw it once and might not even have remembered it properly but it changed the way I felt and how I behaved in similar situations.