Hello,
I don't know whether this is possible or not, but in case it were...
Quite often, bug reports in bugzilla are done without searching for any previously
filed bugs (i.e. the crash of anaconda in 7.3. on bad blocks check), and I
sometimes try to reply to them. However, this causes a mail to be sent to
1 or 2 people @redhat.com.

I have heard a RH emploeyee use the term "bugzilla spam" (no wonder, they
must get dozens of these mails every day), so I wonder whether it would be
possible to add a comment to the bug, which gets mailed only to the original
reporter.
Thanks