Hence, I'll point out here that the ridiculously productive blogger James Lilek has also visited the story, with pretty much the same reaction that I had, but expressed in wittier form:
You have to love this: let’s say everyone agreed not to have children. Then is there anything wrong with this scenario? The obvious answer is “yes; no children” but since the childless future with no humans at all, just birds and fish and bugs, doesn’t mean any human suffering, then the net amount of suffering is reduced, and we can all have a party. This is also an argument for smothering everyone under 15 so they don’t suffer broken hearts and angsty 20s, which happen to everyone. But don’t worry; he’s just asking questions.It's all worth reading.