Ask HN: What would it look like if AI agents "took over the internet"?

Asking with reference to Dario Amodei’s statement, “It’s my worry that in 6–12 months such a swarm could be capable of taking over the entire internet with a persistent botnet (potentially causing hundreds of billions of dollars in damage), and that the scale of damage would continue to increase from there if AI becomes more powerful without the necessary guardrails.”