[edit] fair enough, I need to qualify that. You pretty much cannot get too much iodine with something that looks like a normal diet, and in any case iodised salt is not what push iodine levels over the top. And in a normal diets, iodine deficiency is much, much more likely than iodine overload.
No it doesn't. You're ignoring the context.
You can't have too much iodine when it's obtained from iodized salt.
...because you can't handle that much salt.
From the article: 10x'ing the concentration of iodine in salt had no adverse effects. You'd have to eat salt by the pound daily to reach levels where iodine is harmful, but at that point, that'll be the least of your worries.
Based on what reasoning?
e.g. manufacturing error such that a dangerous amount of iodine is accidentally added.
It's probably reasonable for 999 999 people to benefit in exchange for 1 person being very unlucky, but that's a different argument that needs to be made.
And nobody, in this post at least, has made that argument, nor has anyone even linked to such.
You may wish to research the Wolff-Chaikoff effect.