For Greasemonkey/Tampermonkey
FTL: Report Post Button v1.0
This mini forum mod (not for FTL itself) returns a feature that's been hidden away in the forum's theme. And that is the report post button. Found in most phpBB installations, it was rather inconveniencing to not be able to report a specific post without going through the PM method.
It turns out that there wasn't a graphic for the report post button (which was in fact hidden on the page), so adding an image via CSS allowed this to happen:

Clicking on the button would direct you to where the forum would, where you can fill in a form telling the moderators all about the infringing post.

FTL: Unread Post Button v1.01
This script re-adds the button next to forum topics, meaning you don't have to search to where you last left off a forum post. It also removes the 'unread posts' icon from next to the page list, and adds a button to view the last post that a user has made.

Usage:
If you haven't already, install Greasemonkey for Firefox or Tampermonkey in Chrome (the inbuilt user script support may/may not work). Download the script from the link below, and install it when prompted. After that, just open up a forum topic.
Downloads