Fair enough. And just to clarify, when I spoke of stopping abortions physically, I didn't mean killing, or even necessarily any type of violence/contact. I suppose some people would argue for that, but I think even something like taking some pages out of the environmentalists' playbook (e.g. chaining yourself to something in the office/entryway) could have disrupted the day's happenings, and may have made some women rethink things and decide not to go through with it after all.
I know a woman who did this. I'd share the picture, but it's not mine to share. She's a devout Catholic, and she and a group of her comrades literally chained themselves to tables in the clinic. I can't remember the whole story, and it was in the '70's I believe.
Dorothy Day and the Berrigan brothers engaged in similar nonviolent tactics. Operation Rescue also did the same type of things. However, I think Operation Rescue was misguided- not because their philosophy was wrong, but because their strategy was wrong. The nonviolent efforts of Dr. King were based on sound Christian philosophy and sound Christian strategy. There is such a thing as Christian pragmatism. Our Lord told His disciples to be "wise as seprents and innocent as doves." [St. Matthew 10:16]
The Civil Rights movement was ultimately successful because it was purposeful and pragmatic in its attempt to elicit sympathy for the cause. Operation Rescue didn't factor in the necessity of strategizing how to "market" their cause into a movement that would dovetail on the Civil Rights movement. That was their failure. That being said, I know that their actions saved lives, and that cannot be discounted. But I think there was probably a way to save lives immediately while also cultivating sympathy for the overall cause. But Dr. King was a rare genius, and Operation Rescue had a mere Randall Terry at its helm.
I highly recommend reading the works of Dr. King, especially his book "Why We Can't Wait." He is known for his oratorical brilliance, but he was an equally gifted writer- cogent philosophy wed to poetic eloquence.
I also recommend the wonderful biography of the Berrigan brothers called "Disarmed and Dangerous." Their actions met their convictions, epitomizing the concept of "social justice" long before the term was misappropriated by the Left and disparaged by the Right.