I have done all my flying far away from power lines. The other day I stopped at the side of a country road where I wanted to take a video of something. However, there was a power line running along the road and I decided not to fly. I know that flying near power lines is not advised, but are we talking about major transmission lines or just everyday lines? I see lots of videos taken by folks flying in their backyards in a city where there must be power lines nearby. Anyone got a rule of thumb for how close?