Okay, maybe I'm naive to argue that the wifi-resisters deserve a hearing. But how about cellphones? Questioning whether cellphones might cause cancer will also get you ridiculed in many circles, yet studies keep coming out that say there's a risk, particularly for children. Studies that don't find increased cancer risk also keep coming out, so the issue is far from decided.
The best source I've found for following news of cell phone health risks is textually.org: archive of health risk posts.