> The fire hose of data will inevitably become ever more fecal. We can only walk away from it or be more careful about the pearls we pluck out. It ends well only if we get better at pearl detection.

I'm not sure we can. Imagine an AI that 1) creates multiple accounts, 2) spews huge numbers of comments, 3) has accounts cross-upvote, and then 4) gets enough karma on multiple accounts to get downvote privileges. That AI now controls the conversation. Anything it doesn't like, it can downvote to death.

I mean, I'm sure that HN has a "voting ring" detector, but an AI could do this on a sufficient scale to be too large to register as one cohesive group. And I think HN has a "downvote brigading" detector, but if the AI had enough different accounts, I'm not sure that would trigger, either.

The best chance to detect it is just on volume (or perhaps on too many accounts coming from the same IP address or block). But if the AI was patient, I'm not sure even that would work.

That's depressing. I don't want HN to become a bot playground, with humans crowded out. But I'm not sure we can stop it, if it was done on a large enough scale.