wikipedia

Stochastic terrorism is a form of political violence instigated by hostile public rhetoric directed at a group or an individual. Unlike incitement to terrorism, stochastic terrorism is accomplished with indirect, vague or coded language, which grants the instigator plausible deniability for any associated violence. A key element of stochastic terrorism is the use of media for propagation, where the person carrying out the violence may not have direct connection to any other users of violent rhetoric.

Credit for defining the term has also been given to the blogger, G2geek, on the Daily Kos platform in 2011, when defining it as "the use of mass communications to stir up random lone wolves to carry out violent or terrorist acts that are statistically predictable but individually unpredictable", with plausible deniability for those creating media messaging.