I'd hesitate to say anything that backed up their view that abortion was a sin.
Probably better for someone to sue them for harassment or causing anxiety to people in a heightened state of distress or something.
Whatever it is, it must cost them money.
Many of these churches are just fronts for a slick pastor to take advantage of religious sheep and make some money from their hopes and fears.
If you hit them in the wallet, they will not come back. If the big cheese on top finds that there is a cut in his income due to unwise protests, although this would be more of a long-term strategy to ensure they didn't think of doing it again.
After that I'm sure they'll direct their attentions elsewhere -like a soup kitchen or some rehabilitation centre or something to help the young mothers who chose not to have an abortion.
That is what really irks me about this evangelical flavour of Xtianity.
Once upon a time it was about charity and helping those who were disadvantaged.
Now its about hellfire and brimstone and having a go at somebody else.