A proposal: as it is, NPR is going to have to look at their referrer logs to identify linkers who skipped their form. Alternatively, and more simply, they could just allow people to link whenever they want. They can look at their referrer logs to watch for undersirable referrers ("teensluts.com", Zooey?) or bandwidth abusers. It shouldn't be a lot of trouble to block these referrers. Innocent users browsing from teensluts.com to npr.org could be shown a message page explaining why the link has been forbidden. This would work in a frame as well. And even better, the message page could include a link to the desired resource in its natural habitat.