Not a pregnancy announcement, but I was at a wedding in November and this chick was going on and on about how horrible it is to have kids, how expensive they are, how her child support checks are the only reason why her son is getting the things he wants for Christmas, and "why would anyone ever have a kid?"
I wanted to reach across the table and slap her.
I wound up having to leave for a while while my dinner got cold and have a cry out in the hall.
It really is amazing how insensitive people can be.