Wow, that's disturbing. The typical household variety isn't strong enough to do much more than give you a nasty upset stomach and maybe vomit a bit. I guess drinking a lot might cause irritation. But if quacks are peddling this, it's only a matter of time before someone gets creative and finds some of the 12% stuff in some hair dye kits and other beauty products. Internal chemical burns are pretty nasty stuff, and surviving the ordeal is option
