1) For Debug Output one should use DEVDEBUG instead of echo ... doesn't destroy the Layout

2) You can "output" an object just like an array: print_r($object)
3) OOP is a great concept, although PHP (yet?) isn't "really" object-orientated.
4) In the constructor (and all Methods of Class vB_Input_Cleaner), the Userid is available as
PHP Code:
$this->registry->userinfo['userid']