Would you allow a convicted child molester, one who had done his time and accepted Christ, to babysit your kids or grandkids?
There’s a difference between public and private sanctions. Michael Vick has paid for his crime and is free from any more public sanctions. He has every right to live his life freely now.
Would I allow Michael Vick near my dog, that would depend on how repentant I think I think he is. My understanding is that he is raising his kids to love dogs as companion animals. That suggests he is highly repentent.
As far as your child molester question goes, no I would not, but that is a private sanction. If he’s fulfilled his public sanctions, he is a free man, just not near my kids. If he’s really repentant, he will voluntarily stay away from kids.