Did you read the article, view the pic there of the [adjusted] billboard, and the comments that followed?
Here's one that touches upon the way the thing came across to me;
Sorry I am still trying to understand how that picture was blasphemous. I believe it shows Mary in a modern light and allows all of us to better appreciate the possible thoughts that could have entered her mind during Annunciation. It didn't change the story outcome nor assume she sinned. Pardon my Catholic immaturity I guess.
Honestly this picture was the catalyst of long reflection on Mary; I have a deeper more complex appreciation for the Holy Mother thanks to a different perspective.
One man's blasphemy in another man's spiritual lesson
It doesn't enter my mind that abortion would have entered her mind, if that is what is found blasphemous. Otherwise, I'm not sure exactly what rises to the level of "blasphemy".
If we look at the last two sentences of the woman's note, it appears possible that sort of reaction is what was intended? And that the church who displayed it did so as an anti-abortion statement? Like, "hey, ladies. don't do that. you may be interrupting something very important!"
Was that church trying to say something else? Please, no rumor mongering, opinion based innuendo, or the like. Just plain facts if possible.
Simply put, it's called the "Step On A Crack" apologetic - it's considered blasphemy to do anything that might depict the Virgin Mary(TM) in a less-than-Catholic way (including suggesting that Mary suffered labor pains in giving birth to Jesus).
The Virgin Mary(TM) is a registered trademark of the Catholic Church. All rights reserved.
That indicates, at minimum, that she did not believe the word of the Angel Gabriel who said that she would conceive by the power of the Holy Spirit. There was no need for a test. "Let it be done unto me according to thy word", makes that clear.
It's also suggestive of the idea that Jesus was conceived by sexual intercourse, which in turn requires that Mary was not a Virgin. This suggestion is strengthened by the fact that this same church has previously erected a billboard which showed an image of Mary and Joseph in bed after sex.
That fits my definition of blasphemy.