The [-] button is actually a handy thread-collapser. The downvote button is a mirror image of the upvote button and only shows if you have several hundred karma.
Re:Richard M. Stallman resigns
by baud147258 on Tuesday September 17, 2019 @08:53AM
(#20994391)
500 karmas for downvoting, at least it was then that the downvote button appeared for me a few months ago.
Many angry down-voters bashing that [-] button only making my point.