zingming

Hide unwanted comments without deleting them. Edit the comment and wrap the offending text in [shush][/shush]. Example: [shush]FIRST!!![/shush] or [shush reason=”Boring”]FIRST!!![/shush]
Readers can choose to read the buried comment by clicking on the “Show” link.
(Bonus: You can also use this shortcode in your posts as a “Spoiler” hider.)

ShushThatNoise – Ignorant Comment Hider

Hide unwanted comments without deleting them. Readers can click on the "Show" link to read the buried comment.

Hugh Lashbrooke

This plugin is built for and requires <a href="https://github.com/Automattic/o2" rel="nofollow ugc">O2</a> to be installed.
This plugin allows you to mark a selected comment as the one that effectively sums up the conversation from the thread. This is great for disucssions that require a final decision to be made, support threads where one comment has the best solution, and a host of other uses.
Functionality includes:
<ul>
<li>Marking a chosen comment as the ‘top comment’</li>
<li>The top comment is displayed at the top of the comment list with a ‘view in context’ anchor link</li>
<li>The top comment is also highlighted in context in the thread</li>
<li>Only one comment can be selected as the top comment</li>
<li>The top comment flag can be removed</li>
<li>Only users who are able to edit the post can select a top comment</li>
<li>Includes basic styling for top comments</li>
<li>‘Top comment’ label can be translated and/or filtered</li>
</ul>
<a href="https://github.com/hlashbrooke/The-Final-Word" rel="nofollow ugc">Contribute on GitHub</a>.

The Final Word

Have the final word in a comment thread by marking a chosen comment as the 'top comment'.

ShushThatNoise – Ignorant Comment Hider vs The Final Word