Oh, one of them likes to pretend to be a demented old man and
keeps repeating the same questions to the poor telemarketer!
He'll ask them to work out the cost of
a certain plan, and then talk about another one, and then apologise
for having a poor memory and ask him to repeat the price of the
first plan again. 
He must've had a lot of time to kill, or had been trawling the
web for such cunning plans.
I just witnessed a moron drive his/her
SUV into 3 parked cars downstairs, and then speed
away.