Prison rape and a culture of defining the disenfranchised prison populations with a wide brush and a narrow view are absolutely a real problem, and the fact it can be used as a deterrent from committing crimes is why it will never be properly addressed.
A man gets sent to prison and one of the inmates is showing him around.
"Prison isn't so bad, we have cable, free food, exercise equipment. Hell, we even put together a box that if you put your dick in one end you'll get a great blowjob, and on the other end you can jam in for a tight fuck. You'll be able to use it everyday but Tuesdays and Thursdays."
"Why not Tuesday's and Thursday's?"
"That's your shift in the box"
I think American History X was enough of a deterrent from dreaming of the easy life of incarceration.