Back in the good old days of detector vans it was a very lucrative source of overtime for us poor underpaid GPO Engineers once every three months. We used to troll around with a bloody great oscilloscope in the back of the detector van with it's big horn aerials and watch the teles fly into back gardens.
Yes it was possible to detect what channel you were watching but there were only 3, most of the time we just drove up and down the road parked up went to the local pub and just let it be known we'd be back the next night and we had a list of houses that had caught our attention.
It used to save the poor guy from the Post Office getting his head kicked in on the doorstep, happy and as I said lucrative days.
Yes it was possible to detect what channel you were watching but there were only 3, most of the time we just drove up and down the road parked up went to the local pub and just let it be known we'd be back the next night and we had a list of houses that had caught our attention.
It used to save the poor guy from the Post Office getting his head kicked in on the doorstep, happy and as I said lucrative days.