We get those too
As well as yanks trying to sell us shares in some company that I have never heard of (and probably does not even exist).

We have a game that is reserved for them and recruitment agencies (another scourge of the earth). We call it phone tennis.

The general aim is to see how long you can keep them on the phone and how many people you can pass them around to until they hang up. you get bonus points for really outrageous names an departments.

For example, recruiment agency scum (RAS) calls: "Can I speak to the person in charge of recruitment"
me: "I'll just put you through".
I then put them through to Tim (who has nothing to do with recruitment.
Tim: "Cryogenics, Dr Rolo speaking" (he got extra bonus points for that)
RAS: "I am after the person who is in charge of recruiting"
Tim: "Ok, you have come through to the wrong department, I'll just put you through" (dials Chris, who has nothing to do with recruitment)
Chris: "Hello canteen" etc.

Our record is 8 transfers and 15 mins.
(Tom Jones's Mojo Hasn't had any since, Wed 10 Sep 2008, 15:48, Reply)