Cracking way to treat these intrusive idiots, maybe it could be angled to cover the multitude of indian call centre bods trying to hawk mobile phones and cheap DVD's etc. Arrsers out there might be able to divert their twisted minds to this task.
For the first time in over two years I am actually looking forward to my monthly cold call from Anglian home improvements! The usual rant down the 'phone of "fcuk off you cnut, delete me from your calling list NOW!" was wearing a bit thin, and to be honest, the missus was getting a bit embarassed explaining my actions to visitors! This is going to be much more fun.