In this article's case it mixes things actually barred by state law with alleged violations of a bargaining agreement and such. So IMHO "crime of email" in the

In this article's case it mixes things actually barred by state law with alleged violations of a bargaining agreement and such. So IMHO "crime of email" in the headline is a legitimate metaphorical use of "crime" while the mixed situation in the article makes it merely confusing.