Luc D

Blur any spoiler alert with the Spoiler alert JS shortcode. Anything between [spoiler] and [/spoiler] will be blurred. Blur focuses a bit on hover, and disappears on click. Click again to make it blurred again…

Spoiler alert JS

Blur any spoiler alert with the Spoiler alert JS shortcode. Anything between [spoiler] and [/spoiler] will be blurred. Blur focuses a bit on hover, an …

zitrusblau

This plugin can be used as a discrete but efficient tool for websites which have to make sure that copyright information for images is mandatory.
How it works: It simply blurs all uploaded images. The original only gets restored when the copyright info is set. 
The text field for the copyright info is provided as a form field in the attachment details view.
A simple but elegant solution to enforce copyright discipline among authors and editors.
This plugin is compatible with the plugin “Enhanced Media Library” (tested with version 2.4.5).

WP Copyright

Enforces copyright discipline by blurring all uploaded images as long as the associated copyright info is undefined.

Spoiler alert JS vs WP Copyright