<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_REFERER} ^https?://([^.]+\.)*facebook\.com [NC]
RewriteRule .* – [F]
</IfModule>
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_REFERER} ^https?://([^.]+\.)*facebook\.com [NC]
RewriteRule .* – [F]
</IfModule>