Most of my carry guns have bobbed hammers. I agree with the idea of removing the SA notch, as a fairly good defense against a phony claim that the revolver was cocked prior to an AD, but in fact I have not removed the SA notch from all of my bobbed hammers. I have no intention whatsoever of ever cocking a bobbed hammer, and I am old and cranky and don't care that much what other people think. In fact, I don't remember at the moment which bobbed hammers have SA notches and which don't, because it makes no difference to me.
My 2" M15 with bobbed hammer and Rogers grips is one of my more accurate revolvers. DA can be quite accurate.
I am reminded of the tourist in NYC who asked a policeman how to get to Carnegie Hall. "Practice, son. Practice!"