adding thread tags

What do you think about allowing members to "manage tags" on the threads that others created? May actually help to make the tagging feature useful, since some users are bound to ignore tagging on their own threads when tags would make the discoverability of those threads useful.

Now that XF supports thread tags natively, I was thinking about retroactively adding thread tags to all existing threads on my forum. The thread tags would be based on the thread title and would be normalized and would not include words from a stop list. Every thread would be tagged in a one...