I could drive myself and my licensing worker crazy with questions about what's okay and not okay for confidentiality and identifying photos, but three and a half years into fostering, we just try to make a reasonable effort, which sometimes means being very cautious and sometimes going with some "good enoughs." An example of what "good enough" looks like:
Friend at church takes family photo for a hallway that has photos of all the church members (it's a very small church).
Foster parents aren't really thinking about confidentiality because kids are squirmy, I'm not having a good day, and let's just get this done.
Friend says, "Oh no, he held that big cookie up in front of his face."
Foster parents pause and say, "Actually, that's perfect."
So, now we have the cookie picture hanging up in the church hallway.