I like to waste the time of the warranty scammers. I do the whole "which car?" and they start listing off every car I've owned while I say "nope, don't own that one anymore." When they get to the end of the list and say "well, what are you driving now?" I say "well, most of the time, if it's Friday, I'm driving an Altima, but if it's Saturday, I'm probably driving the Prius, but if I need to go to the hardware store it might be the Takoma..." And they say "great, we can get you a warranty on all of those." AND then I say "well, you should probably call Zipcar, then, since they actually own them." It's priceless when they say "ugh, you're a jerk" and hang up on me.