We understand the EM spectrum pretty well. For the most persuasive argument: The cancer rate is up about 1% since 1983. Cancer's mortality rate has also gone down. There are no more incidences of brain cancer than before.

These phased arrays will decrease the overall radiation since it is now directed... we use directed beams for cancer therapy too, because it lowers the amount of radiation to non-targeted tissues.

There are hundreds of thousands of scientists if not millions, and from what I can tell less than 1000 are crackpot enough to try making their money spreading unfounded fears.