Revenge is a dish best-served cold, and these people were able to exact theirs straight from the freezer. Sometimes forgiveness isn't the answer, and the only way to teach someone a lesson is through a good old-fashioned "eye for an eye" policy. 

Getting revenge on a bad driver is difficult to do without breaking the law yourself. The rules of the road are strict, and following them is imperative for everyone's safety. But knowing exactly where the cops are can give you an edge. As one man was giving his friend a ride, he noticed a cop stationed over the crest of a hill. On the way back, he decided to use that information to help him nab an aggressive tailgater. Speeding up as the car tried to pass him, he promptly slammed on the brakes before the crest of the hill. The tailgater, however, found himself with a costly ticket. 

Read that story and other satisfying moments of revenge that are dripping in karma.