They make some good arguments. It's a little bit selfish to have a kid when there are thousands dying of hunger in other parts of the world. Not having a kid is probably the least I can do. That and sending cash to kids like the one here with skinny legs would seem like the only humane things to do. It's ironic, and I don't often use that word, that because healthy food is expensive low income people are more likely to be obese in America. ($.29 hamburger tuesdays at McDonalds) It's totally bassackwards.
The site also makes the interesting point that because we're not smart enough as a species to prevent starvation we could end the suffering simply by not having those kids in the first place.