OP, I think it's pretty crappy to come here and criticize women for going to the ER during a m/c or when they are concerned they are having one. You do not know each individual woman's health history or their state of mind during such a devastating time. You only know YOUR situation.
I had a m/c in July and I went to the ER at the request of my CNM when I told her I was spotting. Did I already know that there was nothing they could do to prevent a m/c if my baby had already died? Yes. Would I have gone anyway? Yes. Why? Because this was my first pregnancy, I was scared, and I wanted as many answers as I could get.
What other women choose to do during their pregnancies, m/c's, deliveries, etc. has absolutely NOTHING to do with you, so I suggest you remember that the next time you think to come on TB and judge other women.