I don't know if I'd go that far. If I lived downwind of a reactor, I'd want some. Effects are reduced as you haven't built up the KI level in thyroid prior to exposure, but it will help. Just like a modern gas mask and proper filters (or a blower), for most people, they aren't needed, but for some people, yeah, they are needed.
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-IronRaven
When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.