Why are we building prisons that guards have to (or potential) to come into contact with the inmates and possibly be overrun??
I disagree with this. Both relieve tensions in a highly volitile setting. There is always an undercurrent of violence in a prison. Vices like these won't take that undercurrent away, but they may lessen it a bit.
I am against taxpayer funded porn and smokes. But if an inmate works a job at 20 cents an hour and pays for his own porn and smokes, than I say let him have it.