We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember Mark Carver
saying something like:

In any case, how do you prove one way or another that those being
'performed to' in a work place or shop are not listeners to the same
radio station anyway ?

More to the point - on many occasions when a radio was on in a workshop
/shop /office, I wished fervently for it to be off, instead of bugging
me with its inane nonsense.
Now - deduct me and thousands of others like me from the 'audience'
figures and see where that leaves the leeches of the PRS, etc.