DOC has always censored prisoner communications and prisoner mail. Prisons couldn't exist if you, the public, really knew what was going on, and if lawmakers realized what prisons really do to the society. For the DOC, however, the terror is that prisoners will get information. One of the principle tasks of the prisons is to keep prisoners ignorant. Obviously, prisoners have no difficulty learning about crime.
Prison is the crime-university.
Every convict is a teacher of his brand of criminality to every other prisoner. There is no kind of criminal conduct that I haven't learned in prison. The DOC doesn't care if prisoners get criminal information. Recently, fixated on its obsession, the DOC promulgated yet another new censorship regulation. While the regulation is absurd and sweeping, it concentrates on sex.