This is disappointing, to say the least. NPR--which, by the way, I support as a contributing member--has a policy on its Web site that prohibits linking its content (like I just did) without permission. There's a lengthy form to fill out to describe the site where the linkage is proposed, the wording to go along with it, and so on.
And to think that only yesterday I linked to an amusing interview on Morning Edition (there, and here, also without permission).
Naturally, such a policy is reminiscent of the flap that resulted when the parent company of the Dallas Morning News sent a cease-and-desist order to a Web site that deep-linked stories in the DMN Web site. However, I can see a number of differences. For starters, NPR does not seem to have ads on its site (I didn't check every single link, so I could be wrong, but it seems to make sense), so bypassing front-page advertising doesn't seem to be the issue. (Of course, many argued that it wasn't the issue in the DMN case either, but rather an attempt by a media company to intimidate a sometime-critic into silence.) Also, much of NPR's content is streaming media, which takes rather more expensive bandwidth; I don't blame the site's Webmasters from at least wanting to know how often a particular sound clip is likely to get linked. Frankly, if the form were a voluntary request, I'd be likely to comply--I often email other Web sites to let them know I linked them.