This has been a long time coming, but the comment tags have now been re-enabled. I want to treat this as experimental, and potentially make a number of changes to them quickly based on seeing how they get used. A few notes about how they're set up now and what I'm planning to do with them, followed by some questions that I'd like input on:

• The main change I want to experiment with is turning the comment tags (mostly) into a system where they're invisible, but cause effects. That is, instead of having the actual tags show up on each comment like they were before, they'll now be something that's "in the background", but can have different effects on comments that get tagged.
• Currently, tags will only have an effect if multiple users apply the tag. This may change eventually if we start granting more weight to certain users that have a consistent history of tagging, but for now it means that a single user tagging a comment won't do anything unless other user(s) also apply the same tag.
• As of the time I'm making this post, you can apply tags, but they don't have any effects yet. This will change very soon (probably even later today), but I wanted to get input on potential effects and get a baseline idea of how they start getting used before I turned any effects on.
• Currently, anyone whose account is at least 7 days old will have access to comment tagging. This is to try to make sure that people have at least a bit of experience on the site before they start using the tags.

Now, questions that I want input on:

• What effects do you think might work well for the different tags? I don't want to bias the ideas by explaining a bunch of my own ones up-front, but an example of the sort of things that I'm thinking about is making it more difficult to reply to comments tagged "troll", such as by requiring the user to click through a dialog box like "Other users have tagged this comment as a possible troll, are you sure you want to reply to it and feed the troll?"
• Is the current set of tags (joke, noise, offtopic, troll, flame) reasonable, or should we consider adding or removing some of them?
• Now that the comment tags aren't being shown, should we consider changing them to more detailed descriptions? It was somewhat important to have shorter, "snappier" names for them before to keep them compact, but if they're not going to be shown often that may not be necessary at all. For example, "noise" could be changed to something more like "doesn't contribute to discussion".

Let me know what you think—the comment tags are definitely one of the important aspects of the site, so I'm excited to start experimenting with them again and am confident that we can figure out a system for them that will work really well and help encourage quality discussions.