OK, you've read what I've written, you know by now I am a staunch defender of GBLT rights and NOT at all approving of discrimination. Please bear that in mind.
HOWEVER, I just have to speak up in defense of mkingdomlvr and what she is trying to say. Teenagers, any teenagers; gay, straight, male, female, black, white, or purple, are REALLY good at figuring out the most explosive, attrention-calling way of doing something. Its the nature of the beast. Now I am not saying anything for sure, or making any accusation; we can theorize all we would like, we simply don't know the whole story. However, it is not outside the realm of possibility that these girls had an agenda; be it revenge, getting kicked out of a school they really didn't want to be in anyway, or just flying in the face of the establishment, as it were. I am sure at 17 they were well aware of the consequences of breaking the rules.
I went to a very conservative christian school as a child (see earlier post on my upbringing). We were all aware of the rules, and we all knew that if we really didn't want to be in this school (where most of us had been put by well-meaning parents who gave NO thought to the child's opinion) the best way to get tossed out was to break a rule and break it in a BIG and attention -causing way.
Not saying they did or didn't, howver it isn't outside the realm of possibility.