The UK newspaper The Daily Mail has the headline
“Could smart meters be used to spy on your home? Devices could be used to create ‘honeypot’ of data to sell onto marketing companies, privacy campaigners warn”
The article states:
“Gas and electricity firms will be able to use smart meters to collect information about how customers use energy as frequently as every half hour.
“This could reveal details such as which rooms and gadgets clients use most regularly, as well as when homeowners are in or out and even what time they are going to bed or how many cups of tea we make.”