Let's clarify that free energy is not necessarily the same as perpetual motion. After all solar energy is "free", as is wind, hydro and wave, various schemes to harvest EM, or pendulums harvesting earth's rotational energy. They're free in the sense that there is no fuel consumed. What the so-called free energy scams have in common is their easily identifiable physical impossibility, lack of coherent explanation of how they work, irreproducibility, and a notion that energy can be created out of nothing - effectively, they're in the perpetual motion bin. Like 14kW of power out of nothing - there's just not that much power to be had there. Maybe 14µW, that I can believe.