I think it was Anglian who rang me and asked me when I would like their surveyor to call. I said "If you send anyone round I will cut them up and eat them". That rather put the girl off her script. Mrs H thought it a bit over the top but as I pointed out, they rang me and so are fair game.
in 2003 I was watching the Rugby World Cup final. Midway through the first half the doorbell went; Jehova's Witnesses ! Mr's H thought I was rude to tell them "F..k off, I'm watching the rugby" and shut the door in thier faces.
For nuisance calls, get a BT call blocker phone; I used to get 3...