[John Diver]

Found it: LancerForHire, LLC. - Bot Blocker

Nothing in the options but maybe the code:

if ($_POST['do'] == 'addmember') {
	$vbulletin->input->clean_array_gpc('p', array(
		'start_time' => TYPE_UINT
	));

	if (!$vbulletin->GPC['start_time']) {
		print_no_permission();
	}

	if ($userdata->pre_save()) {
		if (($difference = intval(TIMENOW - $vbulletin->GPC['start_time'])) <= $vbulletin->options['bot_blocker_time_difference']) {
			if ($vbulletin->options['bot_blocker_report']) {
				$input_cleaner_data =& $vbulletin->GPC;

				eval('$message = "' . addslashes($vbphrase['bot_blocker_message']) . '";');

				if (!($email = $vbulletin->options['bot_blocker_report_email']) || !is_valid_email($email)) {
					$email = $vbulletin->options['webmasteremail'];
				}

				vbmail($email, $vbphrase['bot_blocker_subject'], $message, true);
			}

			if ($vbulletin->options['bot_blocker_bounce_url']) {
				exec_header_redirect($vbulletin->options['bot_blocker_bounce_url']);
			}

			print_no_permission();
		}
	}
}

Maybe this has to be changed:

if (!($email = $vbulletin->options['bot_blocker_report_email']) || !is_valid_email($email)) {
					$email = $vbulletin->options['webmasteremail'];
				}

I don't know what it is under in options if it is there, but I dont see bot blocker or Lancer