Please do your research next time before saying something. It's obvious you didn't because restless leg syndrome is a real condition, passed genetically through families (I for instance got it from my mother). I'm not saying it's serious, in most cases it's not. But it has nothing to do with "people getting bored if they sit for too long." My restless leg can go off regardless of whether I'm bored or fascinated. Many people who have restless leg syndrome have an extremely hard time going to sleep, because their legs will not stop moving. When it starts going, it's impulsive, often I won't even notice it until someone points it out, and if I try to stop it it feels like I'm fighting with my own body. So, please, next time just stop for a second and ask yourself if what you're about to say is based on some sort of facts. Then, if it's not based on facts in any way, shape, or form, just don't say it. Hell, all you had to do was Google it. Or, I could do that for you, here's a link to a facts sheet from the National Institute of Neurological Disorders and Stroke.
http://www.ninds.nih.gov/disorders/restless_legs/detail_restless_legs.htm