[kh99]

Try:

if (!($userinfo['options'] & $vbulletin->bf_misc_useroptions['coppauser']))
{
   // user is not a coppa user (hopefully)
}

Edit: Just decided to look at the code around those hooks that you mentioned, and I'm not sure $userinfo['options'] will be set yet. You may just want to use:

if (!$vbulletin->GPC['coppauser'])
{
   // not coppa user
}