As I'm sure quite a few of you know, I used to work in a call centre, trying to promote kitchens. If the caller doesn't identify themselves immediately, they are breaking the Telemarketing Code Of Conduct (which has to be learned by heart or posted on each cubicle). Same goes for if they don't put you on the TPS if requested.

There is no call to be rude to them! As many people who I spoke to found out, you are much more likely to get the caller to go away if you are polite to them.