I know of a Data Center, where there is a Server which has a Sealed rack connected to it
In the sealed rack is Cameras, and monitoring computers checking Every connection into and out of this persons server.
The staff at the center are not allowed to discuss this machine nor are they allowed to touch it
The server owner is also not allowed access to the machine.
(Note I am nothing to do with the data center nor the servers involved. But I am reliably informed that this is not the only Server in this state.)