Ok, several things here:
1). To the woman that went through the miscarriage, I truly wish you all the best in recovering from your ordeal. Mental and Physical. My sister actually went through exactly what you are going through. She had a miscarriage, had to deliver the fetus, and she was VERY distraught for quite some time. BUT she has had a child since then and, although she is doing much better, it is something that will always be a memory that can not be taken away. But you do have to, in your own time, move on.
2). To everyone else: It is a GAME on a SOCIAL NETWORK. Whether it's for Breast Cancer Awareness, or just to confuse people....it's a game. Let the women of Facebook have their moment to see the clueless people react as if they were really pregnant. I too was confused. Especially after seeing a few people that I know had their tubes tied and their husband had a vasectomy. But, I noticed so many people putting up statuses that I knew it had to be some kind of joke. It does NOT mean they are silly women that have nothing better to do. A lot of these women are teachers, professionals, mothers, even some grandmothers. It means THEY HAVE A LIFE and they don't take every little thing as seriously as everyone seems to be. Enjoy life a little. Smile, laugh at the joke. If it is personally bothering you, simply remove that post from your feed. Or...ignore it. It isn't meant to offend or make personal attacks on anyone. People, in this world of technology that we live in, why is it so hard for people to remember that FB is just technology and not real life?