I announced my pregnancy and have just put up my 12 week scan.
I wanted to share it with important people, most of whom I don't see often.
I am not the kind of FBer with 100's of random people that i used to go to school with though, I have close friends, family and trusted MNers
with a couple of colleagues sprinkled for good measure.
I have a couple of friends who have had fertility issues and one who's baby was born sleeping last year. I made sure I called/text/messaged them personally to warn them first. The response was positive and they thanked me for the consideration.
As much as I wouldn't intentionally upset anybody, I dont know half of what goes on in other's lives and can't censor my posts to accommodate everybody's feelings (that sounds harsh, it isn't meant to be). I have been upset by a few comments friends have put up and in those circumstances I just hid their updates.
Facebook is great for some, the biggest evil in the internet world to others.
It's up to the individual - if it doesn't feel right, don't do it.