Punish everyone for the action of one [closed]

Many of us have experienced this as early in life as primary school.

One person in a group does something stupid, and everyone has to pay the price.

Minimal, Complete, Verifiable Example

Imagine sitting in Math class in a classroom at school. One kid is acting up, shooting spitballs at people, and so the teacher gives extra homework to the whole class.

Is there a word describing this policy? Punish everyone for the actions of one?

(BTW, not that it matters, but, IMNSHO, this is bad policy. Thx, Keith :^)

Solution 1:

Collective punishment is the formal expression:

• Penalty imposed on every member of a group without regard to his or her involvement in the group's actions and conduct.

(www.businessdictionary.com)