[SOPi_Jawbreaker]

The guarding the cannon thing might be a school-related thing. At Penn State, the night before the homecoming game, we have Guarding the Lion and it's kinda like a mini-Pep Rally with music, pizza, soda, and cheering. The tradition started may years ago after another school dumped paint on our lion shrine the night before the homecoming game.

I don't know the whole story with the guarding the cannon thing, but it is a possibility that the sorority wasn't doing anything wrong.