“Is trademark bullying okay if you’re on the side of the angels?”

If they were on the side of angels, it would look less like protecting their market share and more like keeping people from wasting money and actually helping against breast cancer.
Komen is bad enough that I now actively selected against products supporting them– I’ll send money to smaller charities that don’t act like a businesses.
(Since some ass always has to go there, I do care about breast cancer– my mother is a survivor, and there’s a good chance I’ll have it, eventually, too. All the more reason to discourage profit-hunters.)