Model release for silhouetted people?

I just had an image held up because I need a model release.  I find it odd that Adobe thinks there are identifiable people here.  Of course, there's no one I can address this with at Adobe that I can tell. Funny thing is that none of these kids look anything like this anymore, the older three are legal adults and the youngest is in high school.  Am I missing something regarding what "identifiable" means?

We can't accept the image into our collection until you provide a properly completed and legibly written release for all identifiable people in your image(s) authorizing the unrestricted commercial usage of the image.