I also have children, and I'm not sure how it's relevant.
Of course you SHOULD be able to tell someone you're offended without the risk of backlash, but it's always a risk. Clearly Adria decided to handle that risk in a different way than you or I would have.
It's relevant because talking directly to people and not tattle-telling is part of growing up, and it's unfortunate this wasn't done.
It doesn't mean she isn't grown up though as this is just one non-representative tiny slice of two people's entire lives. Honestly, I didn't get a chance to update my message, but another question (seen here and elsewhere) is probably more important: "Why isn't the story about her life being threatened over this?" That's the more ridiculous part of this story.
Of course you SHOULD be able to tell someone you're offended without the risk of backlash, but it's always a risk. Clearly Adria decided to handle that risk in a different way than you or I would have.