1. A method practiced with a consumer electronic device, comprising: receiving content data representing audio, image and/or video content, the content data being received in a file format of a type that the electronic device is capable of rendering to produce a content-related experience, by reason of a first software rendering program earlier installed or otherwise made available for use with the device; by reference to the received content data, determining one or more software rendering program(s) prescribed by a proprietor of the content data for producing a content-related user experience with said received content data; determining that none of said determined software rendering programs is presently installed or available for use with the device; and refusing to render the received content data on the device, despite the capable first software rendering program; wherein the consumer electronic device respects the prescription of the proprietor regarding the software rendering program(s) by which a content-related user experience is to be delivered to the user.