With Facebook friends like these, who needs enemies? Police in Des Moines, Iowa, have arrested 30-year-old Jennifer Christine Harris (pictured left) for allegedly setting her neighbor's house on fire, according to the Des Moines Register. The suspected motive? Retribution for being "de-friended" on the popular social networking site. Nikki and Jim Rasmussen awoke to the sound of a loud "boom" around 1 a.m., officials said, and escaped the home just as the siding on their house began to melt. When asked who might have caused the fire, Jim Rasmussen named Harris as the prime suspect. She and Nikki Rasmussen had a falling out on Facebook, he told police, when a party invitation that his wife volunteered to create for Harris yielded a high number of "declines." http://realestate.aol.com/blog/2011/11/03/woman-allegedly-sets-fire-to-neighbors-home-over-facebook-spat/
That seems like a natural progression. Make party invitation, get in facebook fight about it and "un-friend" each other, set house on fire.