I'm one of the Privileged Commenters who can recommend comments on main page posts. On the Firefly post I recommended some comments that agree with my views on the topic. That thread is now in the first position in the comments (ETA - it's been bumped down but my point still stands) so I ended up shaping the discussion without actually having to post anything and there are no obvious fingerprints that lead back to me. Maybe mods can see who's clicked the star but the average user can't as far as I can tell.
I'm not sure I'm comfortable with this.
ETA -And my throwaway comment on this article will probably stay in the first position for a while. Now I'm going to have think hard about doing this kinds of comments since I might end up bumping an actual thoughtful comment to where few will see it.