Somewhere, someone must have made a guide on how to hack these.
You know that The Terminator movie was a documentary, right?
I've recorded daily power consumption for close to 10 years now in anticipation of the inevitable smart meter, so I can at least guess at any wrong countage. At least the first generations had weird behavior with switched loads, IIRC.
I was reading about people in the Denver Metro that when they had the "smart meter" installed their power bill jumped like 400% for no reason at all and they were able to prove their power usage did not change. I am fairly sure a bunch of people sued Xcel over it.
Oh, they also rolled out Usage/Time based billing that really fucked people that work from home or don't have the "typical" usage patterns. At least there is a (slightly higher) flat rate you can sign up for (you have to call them to have it set to flat rate and they tried really hard to not advertise it). Flat rate is far cheaper depending on how you use power.