Private Eye magazine (and online) do have a regular section called Dumb Britain where they print terrible wrong answers to quiz questions from TV and radio.
Here are some examples
http://www.private-eye.co.uk/sections.php?sect ion_link=dumb_britain&
The worst I heard was a few years ago where one station asked you to send in your bill (gas, electricity, shopping etc) and if you got the question right they paid your bill.
A young lady send in her Electricity bill so was asked what was the best conductor of electricity - wood or water.
"My friend says its wood" said the lady.
Try again says the DJ
"Is it water" she asked
And they paid her bill.
Her son probably sits in the bath playing with his play station.