When is it okay to spoil a movie? When does trolling become art? One artist asked these questions by spoiling the ending of Looper to anyone who happened to drive by. SPOILERS AHEAD (duh)
Seriously, many spoilers. DO NOT READ the next paragraph if you care about how the movie resolves the central crisis.
The message reading "LOOPER/SPOILER ALERT/BRUCE WILLIS DIES" was put up on a "hacked" road sign as part of a one-night installation called "Troll." The installation was just a remotely-programmed road sign in Castleberry Hill, Atlanta.
Rather than warn drivers of impending zombie attacks, artists put trollish messages up on the board and "mimic the incendiary remarks put forth by internet pranksters," as the event's web page describes. The installation asks us why we, ourselves troll.