What about delivery? Without a delivery mechanism to those who need it this would be a well meaning but not very useful.
I agree that the advice given is overly vague. GP should list an actionable way to to give iodized salt.
1. same 'who do I write on the shipping label' concern
2. assumes a sufficient existing salt supply (perhaps these people already needed salt, so this aid healed two birds with one bandaid)
3. assumes knowledge about proper iodization (ratios, sanitation, etc)
It doesn't, which is why it's a really bad idea, there exist charities that can deliver it already just give them the money. Even if you could get it to people they possibly won't use it without the complex knowledge of local issues.
Similar - http://www.luckyironfish.com/