"+/-" feature to show/hide threads. Few times in a year there is an onslaught of "make hn as reddit" (which triggers the erlang effect). While this goes away a

"+/-" feature to show/hide threads. Few times in a year there is an onslaught of "make hn as reddit" (which triggers the erlang effect). While this goes away after few days, there is a trickle of crowd who still persist on unimportant/distracting comments - which triggers more comments below. It would be great to hide these "unwanted" comments.