It didn't, you're not old fashioned, you have class. Some people don't teach their kids about appropriate attire or self respect. Others try but I've even seen kids get out of the car dressed ok and go into the bathroom and change after they are dropped off. Some teens, and lots of adults, want attention so badly that they will do almost anything to get it. Both boys and girls should dress respectfully, as in no underwear showing and nothing skimpy, with holes or that is so tight it looks like they can't breath.
The VBS director, which is probably a woman, should have a talk with the youg lady....with kindness, of course. Our volunteers wear fun colored t shirts with our VBS theme on them... Vacation Bible School is fun for all involved. Kids love it.
Well, you have to give them credit for volunteering. Teenage girls could be doing a lot worse on their summer vacation. Dorothy is right. Maybe a hint to the right person would help give a suggestion regarding appropriate clothing choices.
An acceptable dress code should have already been established before VBS even started. I volunteer at a hospital 1 day a month and the dress code policy was clearly stated in my orientation.