Is rhnsd necessary if we're using yum for updates?

[Clint Harshaw]

I'm trying to shut off any services that aren't necessary, so I'm 
wondering if rhnsd is necessary if I'm using yum to carry out updates 
via mirrors.

(I tried the archive, but apparently it's down:
redhat.com is temporarily unavailable. Please try back later.
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1-888-REDHAT1.)

The description leads me to believe that since I'm not checking in with 
RHN, it's unnecessary:

"This is a daemon which handles the task of connecting periodically to 
the Red Hat Network servers to check for updates, notifications and 
perform system monitoring tasks according to the service level that this 
server is subscribed for"

So what do you all think? Is it okay to shut off rhnsd in Services?

Thanks,
Clint