Programmer, Serial Killer, or both: can you tell the difference?

Can you tell the difference between the sort of person who would write a programming language and a serial killer? It's getting close to Halloween so this is a good time to test your powers of detection. Malevole has a lovely survey that asks if you can tell whether a person is a famous computer scientist or famous for another reason. I'm interested in whether biologists as a group are able to tell the difference. If you'd like to play: 1. Go take Malvole's survey first,

2. Then come back here and take mine.

It won't take much time and I'll post the results up in a couple of weeks.