Expelled? That’s all?
OK, eliminated from the gene pool as a public service, to prevent future acts or spawn from the miscreants.
Is that better? :)
If you read the article, a fired substitute teacher, fwiw, blamed the principal for not controller the environment. That is, letting the little darlings get away with everything, including attempted murder apparently, and not taken any serious corrective action, such as transferring the trouble makers.
Hence, the miscreants are allowed to continue to demonstrate anti-social, not to mention illegal, tendencies with no fears of any worthwhile repercussions.