I don't think that "entities that are formed of humans and computers (and other objects) interacting" is sufficiently specific to be considered a type of existential risk. Any organization can be put into that category and unlike AGI, it's not true that most possible organizations have goal systems indifferent to human morals.

Also, the fact that organizations can be dangerous is well known and there doesn't seem to be a simple solution to that or anything else a small organization could do. The problem isn't about coming up with checks and balances or incentive systems, it's about making people sane enough to use those solutions.