David Garcia

According to WordPress documentation, by default, clicking the .more-link anchor opens the web document and scrolls the page to section of the document containing the named anchor (#more-XXX). This section is where writers choose to place the  tag within a post type. With this plugin we can prevent this scroll down.
Visit the <a href="http://www.seocom.es/" rel="nofollow ugc">Seocom website</a> for more information.

Prevent Read More Scroll

Prevents the page scroll that occurs when clicking in the read more links.

ctomczyk

Spam Prevention for WP Contact Form 7 and WordPress Comments. 
This plugin adds a small code snippet to determine page scroll and add dynamically a unique token. 
It also supports the “Contact Form 7 Database Addon – CFDB7” and prevents contact form submissions from being saved if validation fails.
If the token doesn’t exists while submitting or call directly API then the incoming request will be rejected.
You can see how it works on <a href="https://www.sitelint.com/contact" rel="nofollow ugc">SiteLint</a> website.

Spam Prevention for Contact Form 7 and Comments

Spam Prevention for WP Contact Form 7 (manage multiple contact forms) and WordPress Comments.

Prevent Read More Scroll vs Spam Prevention for Contact Form 7 and Comments