Consider this fact: holding a cell phone (communication wafer) against your head causes the fluids in your brain cells close to the phone to begin bubbling after only two minutes. I don't think I would risk my two intermittently working brain cells to those smart helmets or other bluetooth communication devices. I am old school. I know how to read a map and use a compass. My home phone is hard wired. Completely surrounding my brain in a case flickering with electronic signals of various frequencies does not appeal to me. I suggest those helmets may in fact speed up the development of brain cancer, something that is on the rise ever since cell phones were first introduced.
