That is a bit extreme, but on the other hand they knew that they were breaking the law. It's not like they didn't know what they did was wrong when trying to get an other child.
Overpopulation is a real issue. The earth can't support us if we continue to grow in numbers, the total number of humans actually needs to decrease. The best thing for us humans as a race would be if other countries around the world adopted the "one-family-one-child" rule from China, especially countries like India.