Not many and if you lurk more than comment (like I do) then you don't have enough credibility on this site to down vote or flag things.
Which is in my humble opinion counter productive since a bot would comment far more often to influence the comments than a human which like me often doesn't comment because my comment doesn't hold enough value to further the insightful discussion so I look more like a new account even with many years of membership.
(Sharing next sentence for the newbies, since you know-) All our jobs to flag on site & even email the worst offenders to hn@ycombinator.com . That said I rarely flag or even downvote anything. People either really behave, or perhaps the rulebreakers break rules that don’t grind my gears. Politely admonishing good faith rulebreakers is another tactic in the arsenal.
AI-generated comment posters with comment histories of exclusively slop get email alerts from me. Don’t know whether they’re planning to sell or spam but they clearly need help finding the door :)
HN relies heavily on moderation by users through flagging and downvotes. Hacker News is only going to survive if its community is willing to go to the effort to protect it.
I'd like them to go further and delete links to AI-generated content, but I haven't been able to persuade management to do that yet.