What do we call an occasion when people show that they disagree with something by standing around a person in authority and not letting the person leave until the person agrees to do what the people want?

The correct term is Gherao. Derived from the Hindi word for "encirclement," it is a specific form of protest in India where activists or workers surround a person in authority (such as a manager or government official) and refuse to let them leave until their demands are addressed. This tactic gained prominence in the late 1960s, particularly in West Bengal.

• Wrongful restraint and confinement are legal terms defined under the Indian Penal Code (and the Bharatiya Nyaya Sanhita) describing the act of obstructing or restricting a person's movement, but they are not the common names for this specific protest method.
• Blockade typically refers to the obstruction of a place, such as a building, port, or road, rather than the act of surrounding an individual.

In the 1967 Jay Engineering Works Ltd. v. State of West Bengal case, the Calcutta High Court ruled that while the right to protest exists, a gherao that involves wrongful restraint is illegal.