bad actor

About 0.05 uses per million words.

Meaning

noun An individual or entity with a prior criminal conviction, or who has been sanctioned by the court or regulator.
noun A person with malicious intent.
noun An ill-intentioned, mean, badly behaved or ill-tempered person. .mw-parser-output .defdate{font-size:smaller}
noun Used other than figuratively or idiomatically: see bad,‎ actor.