Sendmail: "exposed" root, why?

[Jerahmy Pocott]

Hello,

 From the sendmail documentation:

"There are always users that need to be "exposed" -- that is,
their  internal site name should be displayed instead of the
masquerade name. Root is an example (which has been
"exposed" by default prior to 8.10)."

Is there actually any reason why root needs to be "exposed"?

Root is set to an external address in aliases and it really
needs to be masqueraded in order to for it to get delivered,
but would that cause problems with anything?

How do you stop sendmail from doing this, I don't see any
directive to NOT expose root, only options to expose other
addresses as well.. Perhaps there is a better way to send
system mailed logs to an external address that doesn't send
them from root?

Thanks for any info!
J.