The words are the NYT's, but italics are mine:

Prison officials said they banned the game at the recommendation of the prison’s specialist in gangs, who said it could lead to gang behavior and fantasies about escape.

The game could “foster an inmate’s obsession with escaping from the real-life correctional environment, fostering hostility, violence and escape behavior,” prison officials said in court. That could make it more difficult to rehabilitate prisoners and could endanger public safety, they said.

The court acknowledged that there was no evidence of marauding gangs spurred to their acts of destruction by swinging imaginary mauls, but it ruled nonetheless that the prison’s decision was “rationally related” to legitimate goals of prison administration.

What's next? Banning Risk because it could foster an inmate's desire to conquer 19th-century France?