I did at my last place . Bloke rang the bell and was polite when speaking to me so I invited in to have a look .Why would you let any random bod take a look around your house? They have no more authority than any other member of the public.
He saw the aerial lead coming through the wall and no telly , didn't pry and after seeing just the one room he thanked me and left .
All the threatening letters then stopped
Everybody was happy .