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It doesn't prevent crime, it only monetizes words and/or actions. I can't think of a single law on the
books that has prevented crime. Law is intellectual property of other people and when it is in written form it becomes a monetized racket for those in one group to profit off of non-existent claims.
A true crime causes harm and/or loss, or fraud

It's an invasion of privacy and it causes more harm than good. The ends don't justify the means.