No Free Speech at Independence Hall (video)

Mark Passio of http://www.WhatOnEarthIsHappening.com wrote the following explanation of what happened in the description of the video above:

On Saturday, May 18th at 3:00 pm, I was walking with my wife Barb in Philadelphia from Market Street to Chestnut Street between 5th and 6th Streets, and handed out a few fliers about how the Federal Reserve Bank is de-valuing our nation's currency to people standing in the line at the Liberty Bell location (something I have done almost 20 times in the past). I briefly spoke to a couple of them who asked me for more information. We then proceeded to continue to walk to Chestnut Street when we were stopped by two Park Police who said that I could not hand out fliers without a permit (I had already finished handing them out actually; I had a few left in my hand, and was in the process of leaving the area). They began citing some obscure federal regulation that I had never heard of. I calmly told them that I was peacefully exercising the Rights of Free Speech and Free Press as I was walking through the area, which are Natural Rights which can not be granted by man, nor alienated from man, and which they do not have the "right," regardless of what the terms of their "job" may tell them, to usurp from me or to stop me from exercising.

Read the rest at:  http://youtu.be/x0vS8VTZ4Sw

Fortunately, this happened near Smokedown Prohibition V so there where activists on hand to video Mark and Barb's detention for trying to exercise their right to free speech. Do these park cops have any idea how bad they look doing this right across the street from Independence Hall? If there is no free speech there where can we speak freely?