Protest marketing

Just looking at this little picture of Sedgefield's very own Free Speech Zone gave me an idea - reversible protest placards. Something that shows you're a moral, decent, fully upstanding member of society who's clearly doubleplusgood and should be allowed to have your (approved) say anywhere on the one side, then when you're allowed to wander freely it can be easily turned around to show your true moral degenerate doubleplusungood self. Well, for the thirty seconds or so before you get caught and then sent back to the Free Speech Zone with the rest of the proles.