Sandboxie Support

I was wondering if sandboxie could be used in the company where I work. I understand that in the registered version you can force people to always run the browser in a sandbox. That sounds good, but what happens when the users exits the sandboxie-process (systray icon -> exit)? Is Sandboxie capable to ensure that a user can never bypass the sandbox?

Forced programs are still respected even when the tray icon (and associated application) are not running.

It still may be circumvented however, by renaming IEXPLORE.EXE to something else.

This could perhaps be countered by applying a firewall policy that only allows the process IEXPLORE.EXE to access the Internet.