Over the years, I’ve accumulated a large list of bugs to which I’ve added myself as CC in bugzilla. I do this when someone mentions something (in a mailing list, blog, or IRC) that looks like it should affect lots of people or will affect one of my own projects when it’s fixed. This helps me to mention them in the Gnome release notes when they are fixed, and to provide useful information when someone mentions the problem again. Your CC list is probably interesting too.
A downside is that I get bugzilla email whenever someone else adds himself as CC. By far the most CCed bug in my list is GTK+ bug #56070 – “Can’t click button after setting it sensitive”. I think I get email for this, or the Ubuntu bug #22930 “Newly-sensitive button ignores clicks until cursor re-enters it” almost every day. I guess that roughly 1 in 1000 people who have a problem try to report a bug, and I guess that 1 in a 1000 people who try to report a bug actually find the original bug report and CC themselves. So fixing this would make several million people happy. Even if it’s only a few thousand people that you make happy, you’d be a hero.
It looks like Matthias Clasen will be that hero. He might like some help testing or reviewing the patch.
I think you should be able to not get email when somebody adds themself to the CC field if you click a box on this page: http://bugzilla.gnome.org/userprefs.cgi?tab=email