How about enabling 3rd party tagging of posts above a certain trust level?
ie; I just started a new thread, so that I could tag the following
it would have made almost as much sense to just tag the post and point them to a list of posts/ threads with that same tag.
if given as Search results for 'tags:low-thc-distillate' - Future4200 it might even highlight the tagging system for our more advanced readers 
although that “%3A” obsfucates the correct syntax.