Delete posts and pages capabilities

If you read WordPress Codex “Roles and Capabilities” page or use plugin like User Role Editor to manage WordPress roles and user capabilities, you saw there this capabilities set, in alphabetical order:
delete_others_pages, delete_others_posts, delete_pages, delete_posts, delete_private_pages, delete_private_posts, delete_published_pages, delete_published_posts.

While these capabilities names are self-explained, it’s interesting, how and where WordPress checks them.

create_users WordPress capability

You can know from that page only that this capability was added to WordPress since version 2.1 and it is included into Administrator role by default. It belongs to Superadmin (for multi-site configuration) also, but you can not see such role in WordPress roles list.

Do you wish to know a little more about this capability or dive deeper into WordPress user capabilities world? Follow me reading this post and you will get detailed report about how and there create_users capability is used by WordPress.

moderate comments capability

What I can say? Do not trust your own eyes. It is not the full true. Only last part of this declaration (about “edit_posts” capability) works as described in relation to the Comments subpanel. Are you not sure? Check it yourself. Take “User Role Editor” WordPress plugin, select the “Editor” role and uncheck “moderate_comments” capability. Then login to WordPress under the user with “Editor” role and go to the “Comments” panel. Do you still see links “unapprove, edit, spam, trash” under the comments there? Thus, you still may moderate comments inspite of you have not “moderate_comments” capability.
So, the next question – what is the real power of “moderate_comments” WordPress user capability?