Argyria (blue skin) from taking CS is caused by people that did not make CS the right way. This man made CS by using salted water, which is a no-no. I don't think it was the amount he drank, it was the way he made it.
Nowadays there are very good CS makers that make CS of a very small particle size, with virtually no chance of Argyria. I'm getting another CS maker and I plan to go back to drinking CS.