They are proud of their sacrifice to The Lilith, their baby-eating Goddess.
I wonder what would happen if some women were to start wearing shirts that say "I regret my abortion--CHOOSE LIFE"? I would think such a message might penetrate the Liberal Mind Fog which infests much of the populace, and I think reactions to that message might prompt abortion promoters to show themselves as who they really are, sufficiently clearly that even those infested by Liberal Mind Fog would be able to see it.
After all, abortion promoters could not allow such a message to go unchallenged, lest people who had abortions, and were ashamed of them, come to realize that wearing such a shirt might help atone for their past. It would thus be absolutely imperative that such people be attacked sufficiently viciously to discourage others from following suit. But how to attack them? The left would try to attack them with some contradictory arguments, but even Liberal Mind Fog wouldn't hide the contradictions, nor would it hide the hatred underlying the leftists' attacks.