We don’t yet have UI for it, so this isn’t obvious (hence the announcement), but it seemed good to clearly communicate that if you tag a post or vote on the tag relevance of a tag-post combination, this information may be viewed by other users and/or the mod team (after we built the relevant UI).
Tagging activity is unlike normal (karma-related) voting, for which the LessWrong team is fully committed to maintaining privacy for.
Karma voting expresses a judgment of quality and/or approval, and it makes sense that for users to vote honestly, they need to feel that their votes will not be scrutinized or judged by others. In contrast, tagging activity – both tagging and tag voting – is an act of content creation for the community. In the same way we want to know the authors of posts and comments, we want to know the “authors” of the tags and tag pages that arise from tagging activity.
Knowledge of the content creators for tagging helps us both in positive ways, i.e. giving credit to those who make valuable contributions, and also in “negative” ways by making it easy to catch abuse/vandalism of the system. And by making it clear who is tagging in what way, it also becomes easier to have discussions about which tags apply where, which are good tags, etc.
A step beyond all this is that possibly the tagging feature will be extended into a full-fledged wiki feature. Obviously, wiki activity (creating and modifying wiki pages) needs to be linked to whoever is making changes. That makes it naturally the case that the tagging system (almost a proto-wiki) needs to link activity to user accounts.
All of the above makes it seem correct for tagging activity to not be private, unlike regular karma-related voting. We will soon launch the expanded UI for tagging that contains a history for each tag which will more clearly display what information is getting shared and how.
Sorry for not having been clearer about this earlier. If you have any concerns about this, don’t hesitate to reach out. Also if you made any activity in the last few weeks that you really don't want to be public, feel free to ping us and we can make sure that those stay private (DM, Intercom, or email@example.com are all good for reaching out about this.)