> Related, a real human on HN is limited to 5 comments per 6 hours, while bad actors simply need to create hundreds of accounts to avoid this limit.
I don't think that's true. I think that's an anti-abuse mode some accounts fall into.
It's even tougher for some accounts, too.
I have always assumed it's sort of an algorithm that manages this, some combination of account duration, "points", etc..