"Vigilantes"? People who express strong disapproval via email are vigilantes now? My goodness, back in my day that term meant something a bit stronger than vocal disagreement. So what do we now call people who engage in the sort of violent behavior that used to be called vigilantism?
We call them terrorists. And the rest of the world has picked up on this new vocabulary too. "Syria is at war against armed groups that choose terrorism." -Bashar al-Assad