I think that it's mandatory for science to have open source code and opendata. It's not science otherwise. Using results of a computation without seein the code it's like trusting a theorem without asking for the proof. So absolutely ask the code.

What to do when you are suspicious about numerical results in a submitted manuscript that you are reviewing?
Is there a word for "rule by criminals"? Not kleptocracy, which is rule by thieves, but more broadly by criminals.
