Alex Raven

Report Post is a highly customizable plugin that lets your visitors to report posts or pages with inappropriate content. All these reports are displayed as a table in your Administrator section so you can decide what to do next: edit contents, unpublish posts/pages, or just delete these reports. The plugin was designed to work in both automatic and manual modes. In automatic mode, the link to report will be added to post’s meta box. In manual mode, you can place the link, button or image anywhere you want in templates.
Features:
<ul>
<li>Easy to use – you can simply activate the plugin and it will do the thing</li>
<li>Highly customizable via Options and CSS</li>
<li>AJAX based – no page reload will occur</li>
<li>Can be used in Automatic and Manual modes (to use in templates)</li>
<li>Works for Posts, Pages and Custom post types</li>
<li>Supports AJAXly loaded posts, ‘infinite scroll’ posts, etc.</li>
<li>Does not use additional databases / tables anymore. All reports are stored in postmeta.</li>
<li>Modal window instead of expandable form (works with AJAXly loaded posts!)</li>
<li>Bulk Unpublish, Publish, Delete Posts, Delete Reports</li>
<li>All texts displayed in front end are customizable via Options</li>
<li>Admin notification about reported posts</li>
<li>Can use Captcha to protect from spam</li>
</ul>
Plugin demo: www.esiteq.com/projects/wordpress-report-post-plugin/
<h3>Usage</h3>
Plugin handles 4 class names. Two pre-defined (.report-post-link for a simple link with exclamation mark icon and .report-post-button for button) 
and two custom that you can define yourself (.report-post-custom-link and .report-post-custom-button, respectively).
To work correctly, report link must be placed inside of an
<
article> tag. Article tag must have id=”post-XXXX”, where XXXX is the id of current post. If your theme does not use
<
article> tags, you can add post-id=”XXXX” attribute to report link, e.g.
<pre><code><a href="#" post-id="<?php echo $post->ID; ?>" class="report-post-link">Report Inappropriate Post</a>
</code></pre>

WP Report Post

Highly customizable plugin to let your site visitors to report posts with inappropriate contents to administrator / editor.

Josh Eaton

Give your bbPress forum users the ability to report inappropriate content or spam in topics or replies. This plugin adds a “report” admin link to topics and replies, when clicked, the topic/reply is assigned a post status of “User Reported”.
All logged-in users can report content and see that a topic has been reported, only Moderators and up can un-report the content. Integrates with the standard Topic admin screens.
When a topic is reported, a banner is shown at the top of the page indicating that the topic has been reported as inappropriate. For replies, a message is added within the reply, before the content.
Requires bbPress 2.4+.
<h4>Translators</h4>
bbPress – Report Content is fully internationalized and ready for translation:
The following translations are currently available:
<ul>
<li>Croatian (hr) – Sanjin Barac</li>
<li>Finnish (fi) – <a href="https://github.com/MarkoKaartinen" rel="nofollow ugc">Marko Kaartinen</a></li>
<li>French (fr_FR) – <a href="http://technocyclope.com/" rel="nofollow ugc">Matthieu Durocher</a></li>
<li>German (de_DE) – <a href="http://www.thunderbird-mail.de/" rel="nofollow ugc">Alexander Ihrig</a></li>
<li>Italian (it_IT) – Barbara Lerici</li>
<li>Polish (pl_PL) – Paulina</li>
<li>Spanish (es_ES) – <a href="http://www.webhostinghub.com/" rel="nofollow ugc">Andrew Kurtis – WebHostingHub</a></li>
</ul>
New language packs, or updates to existing ones, can be sent via GitHub or by <a href="http://www.josheaton.org/contact/" rel="nofollow ugc">contacting me</a>.
<h4>Developers</h4>
Active development happens on Github: <a href="https://github.com/jjeaton/bbpress-report-content" rel="nofollow ugc">https://github.com/jjeaton/bbpress-report-content</a>. PRs welcome!

bbPress – Report Content

Give your bbPress forum users the ability to report inappropriate content or spam in topics or replies.

WP Report Post vs bbPress – Report Content