My love for the open-source community is deeper and broader than ever.
As a Google Groups user I've been handicapped in that it has no built-in killfile capability, but fortunately I use Firefox.
Today I discovered this:
You'll need to go to mozilla.com and get and install Greasemonkey, then reload Firefox (don't worry, it reopens all the tabs/pages you had open), then install ggkiller. Open your favorite group and next to every poster's name there's a link to killfile them.
Mind you I'm never going to be a scriptkiddy, and this worked totally painlessly for me.
SED is so much more pleasant now. ;>)
BTW obligatory disclaimer; I'm not affiliated, didn't write any of the software, make no guarantees, accept no responsibility, YMMV, close cover before striking.
Mark L. Fergerson