Even though big international agencies and phone companies deny it, I know cell phones are dangerous. Even big tobacco companies kept looking for a way to "not prove" smoking causes cancer.
Anyway, right now I'm sitting in front of my computer. There is a electric field around my CRT monitor which is affecting me. My cell phone is in the desk, sending and receiving microwaves probably trough my body. A fallen TV cable runs by my head. It passes current, and it generates another electric field. Also, right now, my body and head are being hit by at least 8 public TV stations signals, and over 100 AM/FM radio broadcasts.
Then, I know there are also Satelite TV that are sending their signals down to Earth. I'm sure my balding head looks like a DirecTV dish from the sky, so I'm a perfect target. Also, the X-Ray devices that are said to check the interior of the houses around the U.S. embassy from time to time must have some good gut pictures of me.
Yesterday I was checking a car and the High tension distributor cables pulled a good shock in my hand. My teeth hurted for a while. My (few remaining) hair looked like Jack Nicholson's. My heart was at high RPM for a while.
Well, It's almost lunch time. Today I got beef. Too bad it might raise my cholesterol level, but I know a high sugar Coke can dissolve the fat, so I will be healthy for one more day. I'll go to the kitchen. Heat my meal in the microwave oven. Those 45 brain-drying seconds I'll spend in front of the oven window will be used to take the pill the doctor sent me to reduce the back pain I feel for driving my car 8 hours a day, in a polluted area. But that pill irritates my stomach, so I will need another prescription in a near future to heal my belly.
After that, I will take the wheel again. I'm pretty sure I will end up figthing with a cab driver (I do it everyday) and my body temp will rise 3º, my blood pressure will be skyhigh. After all done, I'll go to the gas station. I will breathe the gas vapors for about 4-5 minutes until the car is fueled.
Then, I'll go home and watch my fish.
To make it short, IMO, using a hands free device for your cell phone will not protect you from most dangers. However, the tin foil hat may prove usefull someday.