[MileyCyrax]

>If he hadn't coded it, someone else would have.

At his level at the time, sure. Anyone can write a web quiz. But I would think that a lot of the most significant ethical challenges developers face would be in much more specialized areas.

Safety-critical systems often have real-time and embedded components, for example. The regulations for safety-critical software vary a lot between industries, too, which makes it even harder to find a replacement for someone who leaves for ethical reasons.