Yes, of course. Actually, I'm planning on people running into problems like these. The "VM" (in quotes because it's very loosely a "VM") the user-written scripts will run is also the same one running the monster AIs. Pieces of user-written scripts will mysteriously find their way into the gene pool! ;)

The whole point is to have a world of chaotically produced djinns whose aims are not yours, produced by a force you can't control and not meant to be easily comprehended by human brains!

An alternative view of the lesswrong essay is given criteria A B and C and you only pay attention to the simple obvious A, once A meets some kind of obvious engineering limit, the other criteria (which might be totally surprising) become the dominant selection critera. And that might make an interesting game mechanic. Once the hunters reach some engineering maxima of hunting, they will end up being selected for something else. Awesomeness or who knows.

This is why I want to try and evolve hive organisms. I think they'll have enough complexity to surprise us.