"There were relatively few secret police, and most were just processing the information coming in. I had found a shocking fact. It wasn't the secret police who were doing this wide-scale surveillance and hiding on every street corner. It was the ordinary German people who were informing on their neighbors."—Professor Robert Gellately

If you see something suspicious, says the Department of Homeland Security, say something about it to the police, call it in to a government hotline, or report it using a convenient app on your smart phone.

(If you're a whistleblower wanting to snitch on government wrongdoing, however, forget about it—the government doesn't take kindly to having its dirty deeds publicized and, God forbid, being made to account for them.)

For more than a decade now, the DHS has plastered its "See Something, Say Something" campaign on the walls of metro stations, on billboards, on coffee cup sleeves, at the Super Bowl, even on television monitors in the Statue of Liberty. Now colleges, universities and even football teams and sporting arenas are lining up for grants to participate in the program.