Jennifer Christine Harris, a Des Moines, Iowa woman, reacted by sneaking over to a house in the dark of night. Sleeping soundly within were her old friend, Nikki Rasmussen, and Nikki's husband, Jim. Jennifer then set fire to the house, apparently hoping that Nikki and Jim would be killed in the resulting blaze. The reason? According to the police report, it was because Nikki had unfriended Jennifer on Facebook.

Then there was the drunk Texas man who last month beat his estranged wife for failing to "like" a poignant Facebook post he had made about the anniversary of his mother's death.