When I typed in Pink and gang to do I search most of the sites that came up were for porn. I guess that says a lot about the pink shirts. I also found some other information at these sites. I don't see this as a problem I will have to address in first grade. Would this information make you bias towards students at your school that wore pink?

There was an article in the Chicago Trubune about the pink shirts (summaryof it):
Merrillville students said pink became fashionable at the school after rapper Cam'ron wore pink in a music video and drove a pink SUV. They said it has nothing to do with gangs.

I also found a couple of news stations that had reported on the pink shirts:
http://www.ktul.com/news/stories/0404/138480.html
http://abclocal.go.com/wtvd/news/031104_NW_nopink.html