Disable Comments on Specific Post Types
Turns comments and pings off for the post types you choose, such as pages or products, while keeping them on blog posts.
Snippet Library
Comments snippets for WordPress
Snippets for WordPress comments: fight spam, close comments on old posts, remove the website field, change the comment form and moderate faster. For bloggers and publishers who want useful discussions without the noise.
Disable Pingbacks and Trackbacks
Closes pings on all content, removes the X-Pingback header and the XML-RPC pingback methods. Regular comments are not affected.