I just want to say that you can manage the risk that sex offenders present--even pedophiles. It's a matter of supervision. So it's not necessarily that they need to change their sexual orientation; they need to learn to control themselves, with our help.
Pedophiles are not usually the highest-risk offenders. Sometimes they are, but there are other characteristics in addition to sexual preference that make people extremely dangerous. One of them is their anti-social tendencies--things like psychopathy, and their propensity for risk. Those things in combination with sexual deviance make people particularly risky.