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What if you condensed into #tag.user and highlighted "#tag" when you follow the tag and "#tag.user" when you follow the personal tag? And then have a similar system for hyperlinking - clicking "tag" sends you to the tag, clicking the "user" in "#tag.user" sends you to the personal tag, and clicking the "user" in the author field sends you to their user page. Disclaimer - this might be really difficult to code, I don't know. I dabble in web design, but nothing this complex.