I wasn't that patient. After I asked him for the third time what the point of the call was and what he was trying to sell me, he said, "Sir, we're not selling anything. This is an awareness call to PC users in your town of [whatever]." At that point I decided I had better things to do than jerk the poor guy around.
These buggers are little different too. They are trying to gain access to your PC so they can hack, load trojans, and add malware.
The only sad part is that apparently there are enough naive people out there who fall for it. The longer I can contain them, the fewer victims they find.