I am not an electrician but it would SEEM to me that it would be possible to filter or condition the circuits so that no information would be sent to the meter.
Any freepers out there can confirm this idea?
I would also encourage a metal foil or plate between the meter and the house to reduce the RF coming into the house from these meters.
See post #8.
Inject a faux electrical noise similar to that produced by real systems subject to observation, masking their operation.