Inducing a person to modify his or her beliefs, attitudes or behavior by conditioning through various forms of pressure of torture.
This may be a cute video but its pretty accurate. Especially the part about occasional indulgences.
What is so striking about organized stalking and harassment is that it fits the definition of brainwashing completely.
What makes it unique and why people wont help is becuz authority figures who are percieved as helpful to a victim of coersion are now part of the attempts of brainwashing a target. Also, it's done out in public space or by invading the persons private space.
So who the hell is going to help you????
Organized group stalking and harassment of a targeted individual IS brainwashing/thought reform/behavior modification by definition.