Reuters June 25, 2010: Quote from Siemens - SM Manufacturer
"We, Siemens, have the technology to record it (energy consumption) every minute, second, microsecond, more or less live," said Martin Pollock of Siemens Energy, an arm of the German engineering giant, which provides metering services.
"From that we can infer how many people are in the house, what they do, whether they're upstairs, downstairs, do you have a dog, when do you habitually get up, when did you get up this morning, when do you have a shower: masses of private data."
"Such data might be used in ways that raise privacy concerns. For example, granular Smart Grid data may allow numerous assumptions about the health of a dwelling’s resident in which some insurance companies, employers, newspapers (when regarding public figures), civil litigants, and others could be interested. Most directly, specific medical devices may be uniquely identified through serial numbers or MAC addresses, or may have unique electrical signatures; either could indicate that the resident suffers from a particular disease or condition that requires the device."