I agree with you, it shouldn't be on the list. Like any disease or collection of symptoms, there will always be bullshit diagnoses and related hoaxes, and there is always a bullshit miracle cure. But, being personally affected by RLS, I can attest to its validity. I take no drugs for it, either, but I sleep like complete shit every night and even on a queen size bed, no one can sleep beside me (due to movements). These symptoms are trivially and empirically discernible by any scientist (including my wife), though the symptom of feeling like I have to move my legs while awake is not. However, if you're one of those "knee bouncers" or have some other kind of tic, and don't think you have RLS, try NOT bouncing or knee (for 20 minutes or so). I assure you that it would be very difficult and uncomfortable. The current wiki page is actually pretty decent on this subject.