With metal detectors, X-rays, and TSA you’re not getting anywhere carrying metals without their permission. There’s at least some plausible deniability with non kyc sats.

True, but it doesn't matter. Think about all the things people carry that are made of metal. Then think about how all precious metals are very ductile and most have low melting points. And can be painted. Drugs and explosives get caught because some constituents have high vapour pressures at room temperature, and are not ubiquitous in urban areas. Metals have none of those issues. Easy? No. Better than sats in a brainwallet? Some circumstances