Joe: I need to go to the office. May I go?
Teacher: No.
Joe: Reguardless, I need to go to the office and you have no reason for denying me that privilege. Bye.
That would follow under the disruption of stundents education asking a teacher to do something other the the lesson can be a disruption and you are basically breaking the schools ToS.
1. ToS, haha..
2. I'd definately only do this during work time, or if the teacher started something with me. And if the teacher started something with me, (s)he is clearly already distracted and would probably be fighting longer if I didn't just leave.
Also our security guards have mace and I think handcuffs. We also have a in-school officer.
Ouch, that'd a bit worse. You say "officer", singular, so I'm guessing that'd be the officer involved in playing crowd control down in the special ed room (trust me, it gets bad down there, flying chairs / desks have increased my dodgeball skill) and writing out truancy sitations. She'd probably get involved at the security officers request, but I doubt she'd start something with you.
All in all, my argument towards this is that you're showing spirit towards your LaCrosse team, no? And it clearly says Maury LaCrosse, not Maury, so you're not showing spirit to that school, but to their team. It'd be bad to say that it's your school's team as much as theirs, but it is the LaCrosse team your school plays on, so it's not even "rooting for the opposing team" backstabbing-type stuff.