[jsiva]

I think its more a comment of how we should be open to people contributing to these efforts (while still being mindful of wild claims). While the concept of perpetual motion machines is flawed, the effort put into reducing kinetic energy loss is very useful. Flywheels are being actively studied as a method to store excess energy storage. In the long-term view I don't think you can consider anything not worth spending time on, the result just might not be applicable to the original goal.