Just use AI to fight AI, that's the only sensible way we can keep up. So if you're low-quality PRs, reports etc, have LLMs filter them out. Like how once upon a time we used to drown in email spam but it's now mostly a non-issue thanks to intelligent spam filters, the same needs to happen for opensource projects. Use AI to fight AI.
In other words, have more money to pay than your enemy.
This game will end horribly.