A specific example: one person works with H8-GPT using a list of 1000 subreddits to tailor misogynistic messages to each subreddit at a rate of 20 posts per subreddit every day.
Automated cross posting detectors wont work against such messages, meaning human moderators would have to work a lot harder to stop the output of one person.
And there would be more than one person. You could effectively destroy thousands of forums with very few people this way.
You not just write it once and copy-paste it to every youtube comment section? I don't see why being able to generate it cheaply matters much, the number of words you write has nothing to do with the number of impressions.
There are plenty who would want an AI that generates hate speech when explictly instructed to.