What is /wp-includes? Should it be disabled?

[OpalescentGames]

To the best of my understanding, some data is being pulled from this folder to use in articles, etc. How can I block access to this folder? Will it have any negative consequences when blocked? I added the following code to .htaccess, not sure if I did it correctly as I don't have full knowledge: RewriteEngine On RewriteBase / RewriteRule ^wp-admin/includes/ - [F,L] RewriteRule !^wp-includes/ - [S=3] RewriteRule ^wp-includes/[^/]+\.php$ - [F,L] RewriteRule ^wp-includes/js/tinymce/langs/.+\.php - [F,L] RewriteRule ^wp-includes/theme-compat/ - [F,L]