As the father of a young girl, I find pedophiles to be utterly despicable and degraded, but if they aren't acting on those impulses, then I am willing to say live and let live.
On the other hand, I do consider the consumption of kiddy porn to be acting on those impulses, and indirect harm to a minor, and I would turn in any pedophile I knew was consuming child porn. Some shit just won't stand, man.