The messed up part is that most of the students probably didn't give much of a rat's ass about the banner to begin with -- they're merely getting sucked into mob mentality, bullying this girl because it's what the crowd is doing and makes them feel superior.
Here is a transcript of an exchange she had on Facebook. It's long, but the idiocy of those she's debating is really quite amusing.
The ignorance of these people is astounding.
I say, without reservation, qualification, or doubt, that this man is the single biggest asshole I've ever known.
Wish I could say the same. Tragically, I've come across a few people who were/are worse than him.
Also, sorry to hear about your demotion in rank, no-longer-Admiral Lithp.
How much trouble would I get into with Facebook if I sent message to these people pointing out the lack of Christian thought they put int heir messages?
I doubt you'd get in any trouble, provided that you're not abusive, threatening or engaging in ongoing harassment.