I live around the corner from a shul. one shabbos I was walking home with my almost 5 year old sister. we passed a few married men/couples/girls walking and they said good shabbos. As we passed the shul, a group of boys/young men were leaving the shul and just as we passed them, my sister said (innocently and loudly of course cuz she can) “how come they didn’t say good shabbos?” B”H these boys saved me from answering her and a few called GS over their shoulders
Most yeshiva boys I pass move over to the grass so they don’t have the CH”V walk on the same sidewalk as a girl. seriously? I don’t have cooties ya know. but the fathers I see walking w/ their children do say GS. I was a B’nos counselor for 4 years and saw ALOT of fathers w/ kids