What are the advantages and disadvantages of legalising baby bins?

Baby bin refers to a safe place where a woman can drop her baby which she want to abandon. Baby bin was invented in  order to reduce the habit of dropping babies in the dumpster, because in most cases the babies will be dead before they are discovered.
One advantage of legalizing baby bin is that it will rescue a lot of babies whose lives would have been lost otherwise. And no one can tell what those babies can become tomorrow or how much they will contribute to their country and the world at large. Imagine what the US would have lost, if Obama or Thomas Edison has died on the dumpster as a baby.
The disadvantage is that, legalizing baby bin may encourage more women to abandon their babies, especially disable children.
Another dis merit is that legalizing baby bin violate the right of a child to know his or her parents. It also downgrades and neglects the responsibility of the parents to take care of their children.