Prevent password leaks in WordPress comments

hunter2.php

<?php
function hunter2( $comment_text, $comment ) {
	if ( get_current_user_id() !== $comment->user_id ) {
		$comment_text = str_replace( 'hunter2', '*******', $comment_text );
	}
	return $comment_text;
}
add_filter( 'get_comment_text', 'hunter2', 1, 2 );