Sources/BoardIndex.php:
elseif (!empty($row['showOnline']) || allowedTo('moderate_forum'))
Replace:
elseif (!empty($row['showOnline']))
Find, Profile template:
echo '
<tr>
<td><b>', $txt[233], ': </b></td>
<td>', $context['member']['registered'], '</td>
</tr><tr>
<td><b>', $txt['lastLoggedIn'], ': </b></td>
<td>', $context['member']['last_login'], '</td>
</tr>';
Replace:
echo '
<tr>
<td><b>', $txt[233], ': </b></td>
<td>', $context['member']['registered'], '</td>
</tr>';
if (!$context['member']['is_admin'])
echo '
<tr>
<td><b>', $txt['lastLoggedIn'], ': </b></td>
<td>', $context['member']['last_login'], '</td>
</tr>';
-[Unknown]