Let's torture the rapists and paedophiles to death, simply execute the murderers, chop hands off thieves, perhaps just pull a few teeth out of people committing assault, brand fraudsters with burning irons, and deliver a few lashes to people caught speeding. We'll have a society to be really proud of then.
The man is scum, but if we're doing things like that in the name of justice, then we're no better than scum ourselves.
I've never been in a prison, so I can't comment, but I've never met anyone who said it was less than awful. And none of them were at the risk of punishment beatings from people looking to score a few points by bashing up a nonce.