>>That would make the system unmaintainable.
Yep, I'm good with that. I'm not wanting the system to ever be touched once its booted up.
>>How do you intend to configure/install/maintain this system?
It should still be able to boot up and get started, just without interactive command line activity from any logged in users. init scripts only to get it started.
>>Also, it is nearly impossible to keep someone out who has physical access to the system.
Yes not much I can do about that.