I can imagine the conversation by a person without a licence answering the door to one of tthe Capita Goons who insists that a licence must be bought.
"You mean you want me to buy a licence to support the organisation which tricked Princess Diana into the notorious interview, which hounded Cliff Richard and ended up paying hundreds of thousands of pounds of licence payers money in damages, which shielded Jimmy Savile whan everyone knew that he was a paedophile (yes, they did all know), which hounded Lord McAlpine, which re-employed Bashir, knowing his background, which pays presenters ludicrous sums of money to talk about 'ball-kicking', which has stated that it no longer makes programmes for the over-50's, etc, etc. Now clear off".
It does seem unlikely that people without licences will receive any more than a threatening letter. If they went as far as prosecuting and OAP it would make for a great story for the Daily Mail & Express.