I remember when this happened and the guy was detained.
If I remember correctly he was stopped several hours before the rally started. He was outside of the rally area. The Secret Service was called in by the locals and after a brief assesment of the situation declined to take any action as John Noble was not a threat.
I read some of this guys post right after it happened. I don't remember his user name or the forum for sure, but I think he posted about this on a PA gun forum and on the Ruger forum. It might have also been greybeard outdoors or the AR forum.
This sounds like a good cause for jury nulification.
Basically in my oinion the local cops and prosecutors look like fools over this and have their panties twisted, so they're going to show John Noblel who's in charge.