In New Zealand at least, a lot of this data seems to come from imagery; it's quite outdated, the cables are all missing and the voltages are pretty hit and miss. Cool project though.
Not just America. People are stealing copper in very rural areas in my country; in many cases the price they get is hardly paying for the petrol to drive there. We have a whole team now in my company dedicated to repairing damage from copper theft, it's rampant.
I have a job that deliberately runs at 2am and 3am... to update the time in a bunch of really old PLCs for DST. And check that every other device on my telemetry network has correctly updated its time.