New site feature: comment subthread hiding

In the recent discussion on commenting at
LWN, several readers asked for the ability to hide subthreads of a long
comment stream. That feature has just been added; it is also integrated
with the three comment-display modes and with comment filtering, removing
the need for JavaScript for filtering. Hiding is not persistent; no extra
data is stored at either end.

Give it a try; if you have comments on the new mechanism, this is the place
to put them.