I work for a company that works for a company that works for a company.
We have clients that are clients of clients, and may be direct clients in some other aspect.
We host services for these entities.
That is all fine until they don't pay us.

When they don't pay us, there are multiple rounds of contacting someone who will contact someone who will contact someone.
Someday.
Sometimes, someday does not arrive.
At that point, we conduct the Scream Test.
The essence of the Scream Test is:
- This thing is theoretically not needed.
- Let's turn it off.
- And see who screams?
We shut down some stuff today. Waiting on the cacophony...
With scream tests I unusually unplug the nic or whatever the equivalent is in a VM because a server can always have weird startup requirements that no one knows anymore while an unplugged nic doesn't change the running state if you need to bring it back online.
We left that shit running and blocked it with ACLs on the switch.
The guests are kinda black-box stuff to us. Don't want to mess with em.