It would be pretty easy to disallow profile access for banned members. Just as some pages check for groups and if they're admin or moderator, you could add a bit that checks to see if they're banned.
Try this in myhome.php... under:
<br />$userob = new user;<br />
add:
<br />$user = $userob -> authenticate();<br />$Banned = $user['U_Banned'];<br /><br />if ($Banned == '1'){<br />$html -> not_right ("Enter your error message here.");<br />}<br />
You can use the same method in any other page you wish to block banned users from accessing.