I haven't read all 3 pages, so I apologize if I repeat what someone else said.
Here in Maine we have 1 to 1 laptops provided to all students grade 7-12 through the state Dept. of Ed. Most schools have a code of conduct of acceptable internet use, as well as guidelines for sportsmanship. I don't know what Brewer's policy is, but in our school, students are not allowed to use their school laptops for social networking like Facebook and MySpace. We have had high instances of cyberbullying, so we limit what students can do on their school laptops, even if they do get to take them home.
Many Maine schools have a code of sportsmanship as well and students can be disciplined by the school if they say or do something unsportsmanlike. This includes outside of school hours like at a b-ball game. If these kids had said this to an EL student in person, they would have been in just as much trouble. Since it was in writing on the other school's Facebook fan page, it was all that much easier to prove what was "said."