[jamessantiago]

For this I usually think that complexity in general is dangerous when our ability to apply our own value systems degrades past a certain point. For the 2008 financial issues we had a few financial products like subprime loans where the reasoning and economics behind these were complicated enough that most couldn't effectively regulate or understand the implications of their use.

I suppose when enough things go wrong with a complex system it's like having runtime errors popup that you can debug against and get a better understanding of what you created, but that first execution is just dangerous enough that you wouldn't want something that's complex enough to be doing anything important. Then again, we might not think something is complex enough until we start running into the "unknown unknowns" of real world usage.

Maybe a somewhat subjective qualifier for what's "complex" could be developed and then the ethical question is "is due diligence being taken to reduce the risks inherent in this complex system?"