A light skinned person makes about 50,000 IU an hour when exposed to the sun. Y'all might wanna re-think yer position. I recommend ya'all read this article before making such conculsion as you had about people poisoning themselves.
Am. J. Clin. Nutr. 84:694–97 (2006)
If however you have some evidence of what you're claiming as being "deadly", I'd appreciate seeing it. Thanks.