The most recent journal edition of Thyroid has the following:
Potential Risks of Excess Iodine Ingestion and Exposure: Statement by the American Thyroid Association Public Health Committee
Angela M. Leung, Anca M. Avram, Alina V. Brenner, Leonidas H. Duntas, Joel Ehrenkranz, James V. Hennessey, Stephanie L. Lee, Elizabeth N. Pearce, Sanziana A. Roman, Alex Stagnaro-Green, Erich M. Sturgis, Krishnamurthi Sundaram, Michael J. Thomas, and Jason A. Wexler
Thyroid, Vol. 25, No. 2, February 2015: 145-146.
I think this should be archived at TUK to answer those people who believe that iodine ingestion can be done without careful supervision, and lays down the dangers of over dosing.