When should I announce my baby name on social media?

I'm 16 weeks due with a baby boy.  We've been looking at names even before we found out the sex (through blood test) and have been sure on our choice.  I've told people who ask and my close friends and family members and they all love the name.   I already announced on FB that we're having a boy but didn't announce the name yet.  Some people say if I want I should share it, while others say it's early what if we change our minds or another pregnant friend actually steals it?  I put his name on our ultrasound pic with a baby pic app and really want to share it!  Do you think we should wait till later on?  My other pregnant friends are having mostly girls and the one person who's having a boy already announced her boy's name at 16 weeks.