I've sometimes seen people say that they need concrete simple examples of ideas like expected utility and Bayes' theorem. So, continuing in the same vein as An Abortion Dialogue and Case Study: Melatonin, I recently polished up my shorter-but-hopefully-still-interesting article on Console Insurance.
It's basically a short discussion of how back of the envelop estimates show console insurance (and by extension, most warranty extensions) to be a bad investment.
Insurance offers good salesmen the opportunity to take money from those who are too weak or manipulable to say no, even to things they know are bad deals. I don't think many people buy console insurance because they actually believe it's worthwhile.