I've been an amateur radio operator for a number of years and I've ran almost right to (never over!) the legal limit on HF bands (40 and 80 meters, mostly), yet I have never experienced any side effects from the RF from my transmitter, tuner, coax or antennas. HF is more likely to bake your brain than the high band stuff from cell towers. Now where did I put my keyboard so I can reply to this article about uh, what was it again?