Stop Turning URLs in Comments Into Links

Keeps web addresses typed in comments as plain text, so spam links are not clickable.

Code

add_action( 'init', function () {
    remove_filter( 'comment_text', 'make_clickable', 9 );
} );

Links written as HTML anchors are not affected; use the "Strip HTML from comments" snippet for those.

Install WPIDE on your WordPress site (it is free) and open Code Snippets.
Use snippet above adds it from the library in one click. Or copy the code into a new snippet with the same code type.
It is added inactive: review the code and settings, then switch it on.