We cannot, under any circumstances, allow the police or military to round people up, detain and handcuff them, unless cops have a valid and compelling reason to suspect theyve committed a crime. This kind of policing is what the Fourth Amendment was created to prevent.
http://www.aurorasentinel.com/opinion/perry-even-in-a-gray-world-aurora-cops-must-abide-by-unreasonable-search-and-seizure-laws/
I think this pretty much says it all.