[caffn8me]

A group of unconventionally dressed fifteen year olds may be something a stuffy department store would want to keep out What a wonderfully tolerant society we live in!

Macy's probably doesn't have the slogan that their customers are "All races, all sexes, all ages". It must be said that they don't seem to have a particularly good record in this respect - see here

That article mentions previous abuses by Macy's security staff. It also states that Macy's has now appointed a Security Monitor to train, monitor, and investigate complaints about security employees. That might be your next port of call. It's also worth bearing in mind that if you have been incorrectly accused of something it could be defamation. Perhaps a letter to head office outlining the facts would get results.

Maybe one of the more liberal newspapers would take up the story too.

Good luck!