[Bolas]

maybe... just prevent lamers admin to read pms

Nice idea this hack, you can increase protection using your algo to crypt and to decrypt messages (instead using base64).

like

function cryptalgo($message) {
 // blah blah
 return $cryptedmessage
}

and..

 function decryptalgo($cryptedmessage) {
  // halb halb
  return $message
 }

etc..