Imagine you're in New York (or perhaps another major metropolitan city) peacefully protesting.
Your cause? Let's say, to curb excessive influence of big business and the wealthiest 1 percent of Americans on U.S. laws and policy. You're holding up a sign declaring your heartfelt beliefs and chanting a bit with some of your fellow demonstrators when, all of a sudden--bam! The cops slap the cuffs on you, with the intention of carting you off to the nearest police station. Meanwhile, your friends and family are at home completely clueless about your situation.