There are numerous facts which disclosing would be considered a crime. For one thing, copyright infringement is a crime; all that is, in essence, is disclosing a fact. Disclosing trade secrets may be a crime. Disclosing personal health records can be a crime. Disclosing insider information to a third party can be a crime. There are plenty of facts which can be criminal to disclose.

Now, this particular case may or may not be criminal, but it is at least incredibly irresponsible.