A harry is someone walks into a bais medresh with, his hat brim down and a knapsack sporting a white shirt cotton pants and sneakers!
“Oddly enough, camps (the black-hat ones, I mean)seem to turn a blind eye towards older boys in shorts, even though the grounds are packed with girls and women. Kind of a double standard, as they would never allow girl campers to dress down if men were present”.
That my friend is because men may not see above the knee of a woman! (other than those permitted to him) However if a woman sees the knee of a man, she does not run into any Halachic issues!