Since the last thread got locked, how about legal means to get free electricity? One example is an AM crystal radio that receives it's power via a simple antenna. The power source is a radio stations broadcast. As posted previously, there are numerous devices like windmills or water wheels, solar converters that can generate electricity but it costs money. The example I posted about a device that moves along a high tension high voltage line is used by owners of these lines for inspection purposes. Since it's their electicity, it's legal to do this. The interesting thing is that these devices work off a single line.