Making knowledge illegal is a dangerous precedent. Actions should be illegal, not knowledge. Don't outlaw knowing how to make neurotoxic agents, outlaw actually trying to make them.

As for OpenAI immunity, I'm not sure I see the problem. Consider the converse position: if an OpenAI model helped someone create a cancer cure, would OpenAI see a dime of that money? If they can't benefit proportionally from their tool allowing people to achieve something good, then why should they be liable for their tool allowing people to achieve something bad.

They're positioning their tool as a utility: ultimately neutral, like electricity. That seems eminently reasonable.