Most guards could not give a shit less, they're there to do their jobs and go home, so if you're not going to volunteer some other person will, or they'll just take whomever did volunteer. Sure you might run into some dickhead guard that demands it but that guard is just a symptom of our broken system and is most likely operating in a manner that would get them in trouble if the right people are notified.

But as I said to another person who replied to me that then you have prisons like Angola, which are basically just concentration camps, they staff the place with brutal guards purposely to keep the place viciously violent, and every single one of the prisons like Angola should be shut down with the staff prosected.

So it really depends on the prison, but the majority are of the more mellow variety, although overpopulation makes the more mellow prisons drastically less mellow.