So you're done posing as a protester at Palermo's protests Lawrence?? Well here's a few rulings to nibble on... Unfortunately for you the courts have allowed the 1st Amendment to be extremely broad... Got a problem with it? You'll have to change several Supreme Court rulings...
Perry Education Assoc. v. Perry Local Educators' Assoc., supreme court ruling:
"Although a state is not required to indefinitely retain the open character of the facility, as long as it does so it is bound by the same standards as apply in a traditional public forum"
"Government has only a limited ability to regulate expressive activity in traditional and designated public forums. Any content-based exclusion of speech in such forums is subject to strict scrutiny, meaning that the government must show the exclusion "is necessary to serve a compelling state interest and that it is narrowly drawn to achieve that end""
"Government may enforce reasonable time, place, and manner restrictions provided they are content neutral, they are narrowly tailored to serve a significant government interest, and ample alternative channels of communication exist"
Berger v. City of Seattle, 569 F.3d 1029(9th Cir.2009 in this one the court disapproved of the government's "registration system that govern [ed] speech in a public forum and applie [d] to groups as small as a single individual performing without an audience"
"The presumptive invalidity and offensiveness of advance notice and permitting requirements stem from the significant burden that they place on free speech"
Long Beach Area Peace Network v. City of Long Beach 574 F.3d 1011, 1034 (9th Cir.2009): "Advance notice and permitting requirements applicable to groups smaller than 75 people would likely be unconstitutional, unless such uses [of public property] implicated other significant governmental interests, or where the public space in question was so small that even a relatively small number of people could pose a problem of regulating competing uses."
I can provide more if you want... 98% of what I have done, contrary to popular belief, has been within these limits... Then again I guess it's like Planned Parenthood, everyone focuses on the 3% they disagree with... But I do know my 1st Amendment...