Now that tags don't explicitly matter, what is their purpose? To help with similar posts? To help me curate the content I see on the front page? Because it's human nature to categorize things? The questions that follow are highly dependent what one would answer to the above: Is one post only meant to have one tag? Two? A hundred? Should tags be ranked by users by their relevance? What if a troll decides to tag everything on the front page with #dicks? Should the original poster be able to see who tagged their posts with what? Restrict tags altogether? I'm rather fond of how what.cd implements tagging. Half to help the content browser quickly select what they think is interesting 1, 2]and half to construct pretty maps like this one. Having extensive tagging like this opens up the door of post suggestions, like Netflix does with movies, but I have no idea what the signal-to-noise ratio would be when you give the reigns to the users of the website.
