LLMs are not the non-human entities that ruined reddit. Corporations are. And it all started with the huge venture capital infusions in 2014/15 and the obligations those generated. And frankly, these LLM bots they're complaining about are not off on their own. They are, again, a result of corporations. The worst and most dangerous non-human persons. They really need to be stripped of their legal personhood.
In all cases, it comes down to people who have an agenda, other than the good of the community, who perpetrate these actions. We lack a means of enforcing effective sanction on these people.