IF: "Or should people just kind of get over it and move on?"
Ask the victims. Ask the victims' parents & grandparents. Ask a victim & her husband who learn on their wedding night that the bride's trauma is renewed by intimacy with her husband and always will be.
We are not God & cannot know with certainty whether a child molester will reoffend or not. Thus, I would err on the side of protecting children. If one has truly repented then he has come to terms with the monstrousness of his prior conduct and, though probably pained, will be understanding as to why people are wary of him being around children.
Never say never and never say always--but I have an extremely difficult time envisioning myself ever associating with a child molester no matter how much he has repented. A child molester deserves being ostracized from society (frankly much worse). His soul & whether or not he has repented is between him, his confessor, and God. Again, if he has repented he should understand and accept the "punishments" of this life and fervently work & pray for the salvation of his eternal soul.
I can understand there being a punishment (up to death) for certain offenses. I think if the person shows signs of repentance, belief, and to refrain from those offenses ever again...then they should no longer be punished. Of course, we have to be careful in our judgement towards them. And yes, I agree, it is difficult to determine whether or not someone has repented. It seems to me that if someone goes to confession and mass on a regular basis then that would be sufficient enough. But if the person commits, in this case, child molestation after they have shown to be going to confession and mass on a regular basis...then that is a sign they are not a true believer. But I don't see the point in punishing a repentant believer over and over again for the rest of their lives. Especially if the person has shown (with time) that they have turned away from these types of sins.
I don't think its really up to us to determine these types of things...we should leave it up to the Lord...
Do not take revenge, my dear friends, but leave room for God's wrath, for it is written: "It is mine to avenge; I will repay," says the Lord. -Roman 12:19