How will social networks recognize AI-generated disinformation?

They won't. They'll become networks full of noise. To be fair, they already have. The ratio of noise to non-noise is already like 10:1. The real social communication has already moved off of these feed-based apps. It's taking place in closed group chats between people who all know each other.

This was already a major problem before generative AI, so not much.

It’s definitely an arms race. Why do you ask?