idiom > wilfully infestation
Amok

  Explanation: Wanton: any killing or persecution. Rampant: Zhang Shi evil, violent and rude. Freedom to all kinds of evil. Also as "rampant rampant."
  Source: Xiu Song "Yu thief On Sapporo child soldiers home": "thousands of miles, the murder and arson, running amok, into the state into counties, such as unhindered."
  Examples: He lay unarmed 'world', so for the Crown, he is ~ the little emperor. ★ Lao She, "Four Generations" Five