Megan takes issue with the framing of this post linking to Mike Konczal's thought experiment about how credit card companies could rip off senior citizens battling dementia:
[It's] pretty much standard libertarian theory that you shouldn't take advantage of people who do not have the cognitive ability to make contracts. Marginal cases are hard not because we think it's okay, but because there is disagreement over what constitutes impairment, and the more forcefully you act to protect marginal cases, the more you start treating perfectly able-minded adults like children.The elderly are a challenge precisely because there's no obvious point at which you can say: now this previously able adult should be treated like a child. Either you let some people get ripped off, or you infringe the liberty, and the dignity, of people who are still capable of making their own decisions.
The Dish 