VOTE LIKE YOU MEAN IT
That had to be the Campus Democrats at work. But what does it mean, exactly? If I vote like I don't mean it, my vote won't count? If I do mean it, my vote will count extra? If I'm not serious about voting, the terrorists have won? ... Ah, it's not worth trying to analyze.
(I have no idea what that photo is about; I found it this morning on Facebook. Spread it around like you mean it, OK?)