If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
My biggest AI risk worries right now are more immediate than paperclip optimizers. They're wealth optimizers, profit optimizers; probably extrapolations of current HFT systems. The goal of such a system isn't even to make its owners happy — just to make them rich — and it certainly doesn't care about anyone else. It may not even have beliefs about humans, just about flows of capital and information.
I contend that those that exist are already a problem.
How? Because they took some money off other speculators? Because some of them went bankrupt?