I assume computer science results without published artifacts to be fake. When it's so easy to publish and run code, if the researcher can't even do that then I assume the code does not work and thus the results must be fabricated. If your work has trade secrets or something, research publication with peer review is the wrong way to distribute your results.

Computer engineering on novel systems is a bit harder, but a /complete/ spec of the system (enough for someone to precisely rebuild it) should be published in that case. Remote access on request to the prototype would be better.