Gang Stalking

Gang Stalking or group-stalking is a set of persecutory beliefs in which those affected believe they are being followed, stalked, and harassed by a large number of people. The term is associated with the "targeted individual ("T.I.") virtual community formed by like-minded individuals who claim their lives are disrupted from being stalked by organized groups intent on causing them harm.

Terminology
The concept of stalking arose in the 1980s following increased legal equity for women and prosecution of domestic violence. Generally, stalking has a single perpetrator, who may sometimes recruit others to act vicariously on their behalf, usually unwittingly. Beginning in the early 2000s, the term gang stalking became popularized to describe a different experience of repeated harassment which instead comes from multiple people who organize around a shared purpose, with no one person solely responsible.