[defrost]

> Unless they peep through your windows?

If you search|scroll down the TV Licence article for "In 2013 it was revealed..." these days they can literally match flickering light seen through the window bouncing off the ceiling against currently broadcasting BBC | Channel 5, ITV, etc broadcasts.

See: Optical detectors

[exodust]

Interesting privacy issue. Personally I'd want to protect my own home's "light emissions" from peeping toms. My home, my light!

It's remarkable anyone thinks it's okay for a licensing authority to adopt this Orwellian creepiness. The slippery slope is technology increasingly reveals more detail from incidental light and audio coming from private households. We should act now in policy-making to protect this information as we do or should do for biometric data.