If this really catches on and becomes popular for all of Fedora, categories might not be the best way to (uh) categorize everything. So, I’ve enabled post tags. However, there aren’t any actual tags created yet. Discourse has the concept of “user trust level”. By default, you need to be at level 3 (“Regular”) to create tags, which makes sense because it’s easy to make a huge mess (which happened over at Ask Fedora).
But, since we’re new here, I’ve changed that down so that anyone with more than a tiny bit of time on the site (level 1, “basic”) can create tags. Let’s see how that goes, if it’s useful, etc. We can always raise that level later once a basic set of tags takes shape.