Saluting the flag is an American thing that I never encountered, growing up in England. The issue was standing for the National Anthem. The grown up dubs would deliberately sit down and revel in the animosity they created.
As I grew up we tried to find out when it would be played at any event we attended and slip out beforehand. In later years the practice of playing it has largely stopped except at international sports events …
I felt for Witness kids during the Jubilee build up . I remember how hard it was at school when you are a child dealing with these things