The Veterans/bikers' organizations have been working with law enforcement officials in planning their "sound sheltering" efforts.
Myself rather than reving my engine to shut them up maybe shoving their signs down their throats would keep them quiet. After their little run in with the locals in Laramie Wyo. I am surprised that they are coming back out West. Imagine if they start tearing up flags in Greeley they are going to get an education they will remember.