Please note the following:

"Even if you swallow it, there would be no harm, at least not nearly as much as when you ingest fluoride ions, or soluble fluoride salts. Calcium fluoride is used to make laser windows, spectroscopic windows, prisms and lenses in UV and IR range. In other words, it is almost like glass in some of its physical properties."

This is taken from:

http://khemet.co.uk/fluoride3.html

I would use this method to defluoridate a container full of water and dispose of the residue, but I would be unlikely to eat a substance that is "almost like glass".