Actually, Flickr allows others to tag the object, but the issue is only one set of tags exist for the object. To move from the narrow to the broad it would take a little more work to allow all people tagging to have their full set of links stand. So a photo of Buckingham Palace could have 20 people calling it a “palace” and all 20 would remain attached. While this would make the content more rich, it is a photo we are tagging that has no textual properties (other than metadata generated by the camera). Flickr’s favorites is one manner of holding on to photos one likes.The broad folksonomies make a lot of sense on textual content as it permits a broad understanding of the content, beyond that which the content provider offered. The broad folksonomy puts content hooks in ones own vocabulary and allows these hooks to be one’s own. The social sharing of these is what adds richness.A narrow folksonomy on textual content would provide little value other than to extend keywords or concept tags that were not included in the vocabulary. Content owner tagging a textual content item is helpful for categorization and site organization from within, but as a folksonomy tool it is not that valuable.