The only people I could imagine getting targeted more would be cannibals.
A convicted child molestor lives a few blocks away from me. He's been convicted twice for molesting/raping teenage boys and there have been reports of him trying to pick up boys around the docks. Althought there is an occasional report of him trying to pick up more young males, he hasn't been convicted since 2000.
I don't think getting beaten up in prison would make any child molestor feel like recovering. I just think it makes them angrier and want to do it more.