So long as real logistics systems are isolated and secured what real risk to stable society is there?

Your use of the internet may lead you to greatly overestimate the number of people who take what they read online as real. More people than you think treat this shit, regardless of the website/forum, like Jerry Springer and Satuday Night Live; just entertainment.

The STEM crowd often overthinks the impact of violating their pet theory.

Can an LLM escape its computer entirely and stomp through a city center like a kaiju? Settle down.

You're veering towards thought policing over speculation.