I have never understood the lax way most prisons are run. Why do they even permit ethnic or religious gangs to form and grow in the first place? If I was a warden, I would randomize cell placement every six months - just move everyone somewhere else. I would break up any attempt to congregate in groups. I would use Israeli non-lethal weaponry to subdue and terrorize the prisoners (Israel has developed sound-based weapons which cause vomiting and instant bowel evacuations). I would ban all weightlifting, TV and internet. All gang activity would end. All violence would cease. Just do it!