Are you really so incapable of imagining how, in today's P.C. world -- especially on either coast -- it's entirely possible that one viewpoint would cause disruption while the other would not?
Do you even know what the word "arbitrary" means?
IF the pro-homo expression is NOT disruptive and the anti-homo expression IS disruptive, there's NOTHING ARBITRARY about the application of the policy.
Now, go bump your head on that for a while before you spout off again.
Therefore I suppose the way to shut up anyone that a particular group doesn't agree with is to become disruptive and place the blame on the other students.