This is the kind of ridiculous folksy knowledge that old people pass on from time to time. I also hear that masturbation causes blindness.
LFV affects underwater mammals because it is extremely intense through a more dense medium. Headaches are one of few believable side effects "caused by" these generators; it may only be a correlation, not a direct cause. Admittedly, headaches -may- be possible from such a device, if you easily get headaches from sound.
Some of the symptoms being put forth are just plain ridiculous - heart problems, digestive problems, eye problems...these are not likely caused by a wind turbine. Due to the age of the people claiming these symptoms, it seems more likely that they are caused by old age.
I mean, OBVIOUSLY, if you "suddenly" start having such symptoms as trouble with eyesight or heart problems within a year of these turbines being put in, it MUST be from the turbines, right? Not because you're adding yet another 365 days onto an already long life?
Let's face it, sometimes people just look for the easiest thing to blame for their problems...not the most realistic things. There's no magical aura created from turbines that causes your eye sight to fail.