I totally agree with Rainman on this.
I am willing to expose myself to alot of things, if I feel it is worth it. Always been like that, whether it is alcohol or worse, eating unhealthy for periods of time, skipping cardiovascular exercise mostly because I still have the years to fix that, smoking casually when I drink. I enjoy that shit and it's a calculated and moderated risk I am willing to take for the sake of enjoyment.
Risking unknown, possibly terminal adverse effects, such as brain tumors just because I am not using a wired headset shouldn't be one of them. Such a small measure to help prevent something potentially catastropic. I usually have a phone on me to be available to others, not because I really need it myself. In fact I've had one on me (and slept next to one), every minute since I was 14 or so.
God knows how many hours I've spent microwaving my temporal lobes (or my fucking testicles). Creepy shit.