Facebook Pregnancy Announcement

Some chick I knew from years ago just sent me a message asking me why I didn't "like" and/or comment with a congratulations on her Facebook pregnancy announcement. I have so many friends on there. I log in once a day or once every few days. If it's not in my feed as I scroll down, I don't know about it. Well, she's mad at me now. This is exactly why I don't want to announce my pregnancy on there. Some people act weird with social media. I don't need to feel bad for not seeing something. Nor would I do that to someone else. I think she's being unreasonable. Don't you? We want to wait until the baby is born to make a social media announcement. We're telling our family and friends in person or by phone. They seem to really appreciate that.