Well, James, tap water is highly poisonous, fluoridated or not.  Adults would want to consume fluoride in this highly poisonous tap water they consume  because optimally fluoridated water benefits those of all ages, with no adverse effects, your unsubstantiated, laughable, laundry list of disorders notwithstanding.

"Conclusions
The authors concluded that there is an inverse relationship between dura-
tion of water fluoride exposure and dental decay. This relationship was not influenced by the time of initial exposure (pre- or post-adulthood). These findings add to the body of evidence regarding the benefits of community water fluoridation for both children and adults."

----Community Water Fluoridation Reduced Dental Caries in Australian Adults Born Before its Widespread Implementation at Least as Much as After its Widespread Adoption
Slade, G., et al
J Evid Base Dent Pract 2013;13:111-113

Steven D.Slott, DDS
Communications Officer
American Fluoridation Society