These sort of threads turn up on a regular basis with posters giving insight into their ways of dealing with nuisance calls. Things will never change; we will always be subject to these calls. I have friends who go to great lengths to get some sort of gratification from how they handle them. But why? You will not achieve anything!
I never answer my land line, I let the ringing stop then do 1471, if it is withheld or an 08 number I ignore it, if not, I will note the number and call back in my own time.
Meanwhile for a bit of entertainment this is quite amusing.