Steven, 
Tradition is not scientific proof of safety or efficacy.
Dental fluorosis is proof of fluoride's harm.
Part of my living is made treating dental fluorosis.  Thank you for the income.
NSF is a private for profit company with no duty to protect the public.  They protect the manufacturers who pay them for testing.  Have you gotten a copy of their testing on batches of hydrofluorosilicic acid?  
What is the difference between sodium fluoride in a tablet or sodium fluoride diluted in water? Nothing except concentration and pharmaceutical grade quality and dosage.  Water is uncontrolled, a tablet is controlled.  Both drugs.
If fluoride is regulated under drug laws, then it is regulated under poison laws. Read the laws for definition of a poison.  RCW69.38.010
"Poison" defined.