The presidential campaign is in full swing, and the political rhetoric and retorts are flowing. Whether it's candidates or pundits, party faithful or the peanut gallery, everyone's got something to say—most of it reactive. But it's not just politics, strong reactions and judgments abound on a myriad of issues—scandals, "stand your ground," militants and terrorism, religion, morality, and so on. Reaction and overreaction isn't limited to the public arena, it's been going on since humanity existed.