The Nazi's also used fluoridised water on the Jews in WW2, as a mind suppressant.
Godwin's Law!
But seriously, flouride is often intentionally added, and while some scientists and some groups do not like it (though large holes can and are shot in their evidence to support their claims), a number of organisations support it, some of them are listed below (list taken from
wikipedia):
American Academy of Pediatric Dentistry
American Association of Public Health Dentistry
American Dental Hygienists Association
American Dental Association
American Public Health Association
American Water Works Association
Australian Dental Association
British Dental Association
British Medical Association
Canadian Dental Association
Canadian Dental Hygienists Association
Centers for Disease Control and Prevention (CDC)
European Academy of Paediatric Dentistry
FDI World Dental Federation
International Association for Dental Research
National Cancer Institute
National Institute of Dental and Craniofacial Research
World Health Organization
I wouldn't have any problem with drinking water with flouride in it from a water company. I just don't see flouride in the water supply as a reason to remove loads of trace elements, just to fight hard to put them back in.