I don't understand why content labeling was never built into social clients, more particularly into ones that handle different kinds than 1. It's really inconvenient to do it in another app... neither of which (that I'm aware of) were functional the last time I tried. (As always, that could be a me problem) Some things stand alone really well but they need to provide the user some tangible benefit in order for people to leave their comfort zone. Labeling doesn't really do that since there are lots of feed options already.
Now that the WoT relay stuff has some momentum and DoS controls, labeled content feeds could be really interesting, clean, and full of variety between overlapping groups... but it would have to be more easily accessible for the average person to do it.
