Description of problem:
If a bug is only visible to Red Hat people, but was reported by a non-RH person, then it makes no sense to ask for restricting the access (the reporter cannot be changed).

Version-Release number of selected component (if applicable):
3.6

How reproducible:
100%

Steps to Reproduce:
1. find a bug that is reported by a non-RH person (e.g. bug 697021) on partner-bugzilla.redhat.com
2. type a test comment to find "watched" and non-RH people
3. go back, remove those people from Cc, qa-contact, etc.
  
Actual results:
BZ still complains about the reporter, and asks you to restrict the bug

Expected results:
There's no point in asking, because the reporter is there and you can't change it.

Additional info:
If the bug is public, but the reporter and everyone else (including their watchers) is a RH employee, the UI doesn't trigger and lets you add comments without asking.

A less intrusive alternative could be to check for RH-ness when the bug is _viewed_, and toggle the default for comments and attachments from public to private if the bug is not pure RH.