I definitely don't think that Peter would've condoned such behavior. In fact, he even said in an interview that he didn't think that newspeople should be celebrities, they should fade in the background. Keeping the name up there would've conferred the kind of celebrity status Peter wouldn't have approved of. Plus, like it or not, it could inhibit other anchors from doing their very best on the air because there'd always be the spectre. It would be like being married to a widow or widower who always kept the deceased person's clothes and pictures around...just like in the Daphne DuMaurier story, Rebecca.
I think ABC did the right thing with retiring the name...and that those who are making those angry calls need to put things in perspective.