My immediate concern with tags is descending into what Twitter has become: hashtags have been meaningless for a long while since there’s too much wrongly tagged stuff, different communities often use the same tag for different things, or there are ten tags all for the same thing. All of which means we’d need some form of moderator role that handles tags, and while I think it’s doable, it might take some trial and error to figure out how exactly we divide tags between moderators, how tags are proposed/created, and how tags are grouped/combined (e.g. food, foods).
It’s a good reminder that collective/democratic bargaining works. It’s about time we bring back unions and cooperatives.