I thought it was quiet recently

[Limey]

http://www.metro.co.uk/weird/853949-dungeons-and-dragons-banned-from-prison-for-imitating-gang-structure

[der_kluge]

That's actually old news. The issue is that in a game of classic D&D around the table, one person has to assume the role of "dungeon master", which means they are in control of the game. Which leads to a situation prisons want to avoid - a leader, with followers.

Besides, it's prison. They should spend more time banging out license plates, and less time playing D&D.