Jacqueline Duty, of Russell High School in Russell, Kentucky, wore a stars'n'bars themed gown to her prom and got barred. She is suing the school. Go Jacqueline; you are beautiful.
[image source http://spofga.org/flag/2004/dec/prom_dress_lawsuit.phtml]
(local copy prom_dress_lawsuit.txt), 2005-02-25, and many other sites.