The Abuse report web part allows live site users to report various forms of website abuse. These can be for example flame-type forum posts, rude comments on blog posts or message boards, spamming, links to illegal content or any other form of website abuse coming from user input. Reporting is performed by entering report text into the web part's text area and clicking the Report abuse button. Submitted reports are linked to the page where the web part is placed and can be viewed and managed in CMS Desk -> Tools -> Abuse report.
The web part belongs to the Abuse report module. The module's full documentation can be found in Kentico CMS Developer's Guide -> Modules -> Abuse report.