RE: Leave them be.

I don't even want to believe that someone would actually want to modify a baby he has no idea how he was formed. To what end?

I would call whoever that is thinking of modifying the genes of a baby to get a "perfect baby" like you called it, is a fool. The person is sick in the head and needs to be examined. What other perfection would someone want in a baby that's already made perfect by the creator?