12Clicks I definetly see your point and though I don't agree with your philosophy I have to admit you're right except for one thing. This is definetly discrimination, just not one that's punishable by law. You can say that it's because protesters wore peace sign tee-shirts in the past, but the fact is that the peace sign is one of the most familiar symbols in our society. I'm sure the shirt had been worn many times before that and will be worn many times after.
And
at those protesters for not getting a permit. They made everyone hate peace signs. I'm a peace advocate myself but that was a retarded move.