Depending on mood...
There are two options:
#1 - clock the scamming bastards in a couple of seconds then hang up (rude parting optional)

#2 - See how much of their time you can waste... I have merrily spent 15 minutes "following" their instructions before pointing out that my Mac doesn't have that option, making them wait repeatedly while my computer crashes or hangs while they walk me through this (obviously it must have many virii, thank you very much sir for your help in removing them) and acting like a computer illiterate idiot and misunderstanding every question and instruction they give.

You know you have done a good job when they start screaming obscenities down the phone at you when they finally realise you are taking the piss.

Other sales calls I have taken to asking them to wait for a moment while I get the homeowner who would probably like to hear about their exciting double glazing based opportunity and seeing how long they hang on waiting on the now silent line.
(442, Sat 25 Feb 2012, 11:09, 1 reply)

I go for option 2
I ended up with the guy shouting 'why are you being so difficult' at me.
( Mrs Entity is in hiding., Sat 25 Feb 2012, 21:02, closed)