That would require some more advanced tech though. I don't think GPT-3 can target divisiveness yet, especially since it would heavily depend on the community you're writing for, e.g. driving a wedge into the general population is very different than driving a wedge niches. The Linux vs Windows debate might get you engagement in a tech forum, but it'll fall short with social housing activists, and whatever issues they split on will probably not get you anywhere with the tech crowd.

I don't think it needs to understand what a divisive issue is to have an effect. If you've got a human operator who can pick a divisive enough prompt, this can dramatically increase their inflamations-per-hour because they don't need to compose the body text.