Rolling Stone has this article about Anti-Abortion militants harassing the employees of a clinic that offers abortions. I suggest you read the full article first, since it will give you a better idea what these people are up to.
Since they were legally forced to stop blockading the abortion clinics, they now "aim to cut off the supply lines to abortion clinics and demoralize their troops." - in short, they make your life a living hell because you don't happen to support their idea on abortion. For these (often ultra-religious) people only one one point of view is acceptable, and anything or anyone that opposes them must be brought down.
I have no doubt that they'll manage to "convince" (terrorize) some employees into quitting their job, so they can claim that they've won a soul, saved a condemned one, or whatever they want to call it.
While I totally agree that if you can't take on the "enemy" itself, you should try to bring down it's support lines (basic guerilla tactics) in order to make it crumble before your very eyes, these people are blinded by their drive to stop abortion that they look past the possible consequences.
Right now we've got controlled environments where the procedure - which is not to be taken lightly, please read "Cunt : A declaration of Independence" by Inga Muscio if you have no clue - is performed by medical professionals. While one could argue that this still is not a good outcome for the fetus, the mothers' life is in much less danger, opposed to a D-I-Y abortion at home or in much less favorable conditions.
If you believe that scaring employees away from their jobs is the way to go, you actually cause more problems than you solve. Even if you don't like it, abortion is a part of this world, and I believe will still be an option in the distant future.
If this entry made you think - whether you are pro or anti abortion - it has done its purpose. I'm pro choice, pro believing in yourself and the decisions that one makes, and in favor of an openminded attitude. Need I say more?