Interesting Word - Kettling

The police tactic of confining demonstrators in a confined space is called kettling.

(It's a particularly nasty practise that involves the formation of large cordons of police officers who then move to contain a crowd within a limited area, often holding them there for hours at a time. In January 2011 1.900 people signed a petition calling for the practice to be banned. In the USA it is known as corralling, which is an interesting analogy in itself. Should protesters be treated like cattle or tea bags?)