This threads brings up so many issues that it really becomes dicey. I agree that this woman should never have gotten pregnant to begin with. As already noted, she isn't capable of really caring for the baby. Also, the fact that she even had this child says to me that she doesn't really value HER life. What does that say for the baby?
On a personal note, someone said they would "never let themselves get that big." That saying to me that the woman was responsible for getting that big, like you can help it. The woman has a thyroid condiion, so couldn't help getting to the weight that she did. Once there, though, she HAD the responsability for ensuring that her health or the health of someone else (read: the baby) wasn't endangered. It's such a tough thing.
I will say this to you all. Have some compassion and put yourselves in the situation or try to. We could all be in that situation.