For what its worth, you can contact the NPR Ombudsman Edward Schumacher-Matos via this link:
In the "I Want to" box, scroll down to the "Contact the Ombudsman" option.
I've submitted a polite complaint, expressed my disappointment and explained why I did not feel that the piece was up to NPR's usual high standards.
Submitting a comment will get you an autogenerated email from NPR, which will say that every message is read by the Ombudsman or his staff and that the message is then forwarded to the appropriate journalist or manager.