Fluorine has a protecting action against caries, but this is a local effect. If you drink it, you are running the risk of all kinds of toxic actions.
I don't know what people who I've never met think about me. Some have written horrible things, some have written nice things - but I'm proud of the fact I've remained close to everyone I've ever worked with.
Whether or not all this came to pass in an East African ditch, I wouldn't like to say. Perhaps it happened in North Africa or further west, but Africa was definitely the place.