This is hook_form_alter from signature module://cleaning signature in comment/reply if ($form_id == 'comment_form') { $form_values = _comment_form_submit($form_values); if ($cid = comment_save($form_values)) { return array('node/'. $form_values['nid'], "page=".comment_last_page($form_values['nid']), "comment-$cid"); } global $user; if ($form['comment_filter']['comment']['#default_value'] == $user->signature ) { $form['comment_filter']['comment']['#default_value'] = ''; } }}I want to sneak this into it: