Re: Correlation, causation, and all that
Yes, well, that's the crucial bit and the only one worth remembering about the whole "study" (I think I'd prefer to investigate the scattering effects of a glass of Martini instead - well, it definitely scatters my brain...). Unfortunately, all the nutjobs will hear is "see, I told you! Glowing crystals and stuff!" instead of "stand here and you have reception, stand there and you don't - or maybe you get two bars less..."