James, you are not providing a "few" studies which you believe support your attempt to induce unwarranted fear about cancer, you are providing the only 3 that you can ever provide to support this irresponsible claim, one being the dissertation of a graduate student, which was refuted by the lead researcher in the study from which she obtained her data, and the other two merely suggesting some sort of correlation.  In contrast, there are volumes of studies which conclude there to be no such association.

------International Agency for Research on Cancer, IARC Mondographs on the Evaluation of Carcinogenic Risks of Chemicals to Humans, Volume 27. 1982

------ (Moss et al. 1995, Gelberg et al. 1995, Freni and Gaylor 1992, Grandjean et al. 1992, McGuire et al. 1991, Mahoney et al. 1991, Hrudey et al. 1990).

------San Francisco Department of Public Health, Current Scientific Evidence: Water Fluoridation is not associated with osteosarcoma. 2005, 

to be continued....