Honestly, in my opinion I don't think it would work very well. First if the goal is to roleplay like real prisons, there will always be someone who will have a knife or even a weapon. There may be corrupt cops who will offer guns for cash and this will obviously improve roleplay but those without guns will feel wronged. And you think this won't be an excuse for SOME to use this environment to do DM? Many will seek feuds between each others inside the prisons, even mobsters will do RP as gangsters and this will be controversial because in the cities of San Andreas today we notice that mobsters go out to kill a gangster or even a gangster confront a mobster as if nothing was. Mafia will always be much stronger than gangs, due to their money gap but this is something that until today no one realized when a Corleone could hunt a Balla or other examples. What I mean is that mobsters are always the smart ones who profit inside the prisons, who use the mind instead of the force and the gangs are fighting to "conquer territory" between each other but since this is not fun, everyone will want to fight like crazy people, confronting others and even if there is someone you don't like inside, there will be metagaming just because of _Tag.
I'll vote YES but there's my opinion and I respect yours.