Power an LED light from your phone line for free

This hasn't been news for about thirty years and it's been in archives since at least 1999:

http://www.phreak.org/archives/The_Hacker_Chronicles_II/phre... http://web.archive.org/web/*/http://www.phreak.org/archives/...

LED? I've been charging my electric car from my phone line for years.