Blackmail / Extortion

Blackmail is an act of coercion using the threat of revealing or publicizing either substantially true or false information about a person or people unless certain demands are met (from Wikipedia), Extortion is the more general concept of threatening someone to get them to give you something. They are often discussed together as a reference class.

Applied to The Aliens have Landed! by Multicore ago

Blackmail is an act of coercion using the threat of revealing or publicizing either substantially true or false information about a person or people unless certain demands are met (from Wikipedia)

Applied to Privacy by Ben Pace ago
Applied to The Blackmail Equation by Ben Pace ago