ObscuraCam is a phone app for Android to help citizen-journalists obscure faces in crowd photographs and videos, say, in undemocratic societies.
It might be helpful in building your church’s website. You can use it to hide the faces of minors and other vulnerable persons, should your church’s policies require or recommend it.
Two examples:
Your blogger, anonymized.
Your blogger, who doesn’t want his book choices known. (It isn’t perfect.)