Either because you wanted them to, or because they took it upon themselves?
We had to tell people who we told in person about my pregnancy to not announce it anywhere. Two days later someone announced for us, I was SO irritated I made DH tell them to take it down. We found out about my nephews passing (born early) and my nieces birth on social media. I was so heartbroken. So again after our kids were born we asked that people let us announce when we were ready.