Well, there is a little workaround but it isn't the most idea. Every request has two "people" options. There is Requested By and Primary Contact. You might show the Primary Contact field and then have people use that field as CC. That way the original requestor still sees it (as they are the Requested By Person) and then the Primary Contact will get notifications for it as well.
And then if you have any reports about requests people have made, make sure you have the filter "Requested By = $$USERID" and "Primary Contact = $$USERID"
Not the most ideal, but something you can work with for now.