ylsine

Do you have a blog that really only want ready by humans? Do think that 
<a href="http://google.com/" rel="nofollow ugc">robots</a> should never be able to read your blog, even if they ignore your robots.txt? Is privacy your number one concern? Do your friends think of you as “that total privacy nut…you know too much so.”? Then this plugin is for you. The 404er will make every public page of your blog return a <a href="http://en.wikipedia.org/wiki/HTTP_404" rel="nofollow ugc">404</a> instead of the normal <a href="http://en.wikipedia.org/wiki/List_of_HTTP_status_codes#2xx_Success" rel="nofollow ugc">200</a>. Yes, you could use the normal <a href="https://codex.wordpress.org/Settings_Privacy_SubPanel" rel="nofollow ugc">privacy subpanel</a>, but that would be sooo pedestrian. Step up to the real (excessive, <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.5" rel="nofollow ugc">RFC abbusing</a>) 404!
Note: If you did not detect any humor in the above text or you do not know what a 404 is, then, in all caps, DO NOT INSTALL THIS PLUGIN!

The 404er

This plugin will send a 404 header for every public page on your blog.

Andy Fragen

Remove default header images and load custom header images from ‘The Headers’ page. Allows for easy selection of random header images in your theme.
A plugin that should be able to remove default headers for a theme and add custom headers based upon the article written by <a href="http://juliobiason.net/2011/10/25/twentyeleven-with-easy-rotating-header-images/" rel="nofollow ugc">Julio Biason</a> who was inspired by <a href="http://wpti.ps/?p=107" rel="nofollow ugc">wpti.ps</a>.
Create a Page named The Headers. Then upload header images (media files) to the the page. The page may have a visibility of private. All images displayed on the page will be parsed, those attached to the page and those added via image blocks.
Once the custom header images are loaded, just go to <code>Appearance > Header</code> or <code>Customize > Header Image</code> and select <code>Randomize suggested headers</code>.
The plugin will display an error notice if there is not a page titled, The Headers.

Add Custom Header Images

Remove default header images and load custom header images from 'The Headers' page. Allows for easy selection of random header images in your theme.

The 404er vs Add Custom Header Images