In the U.S., come mid September, those 14 and over can create profiles on LinkedIn. In other nations they can be as young as 13. Here Ingrid Lunden at TECH CRUNCH presents the details.
This gives youth the edge earlier generations didn't have: the ability to experiment with personal branding and put it out there. The beauty of LinkedIn profiles is that they are a work in progress. They can be constantly changed.
That's where we ghostwriters might come in. There could be a lot of assignments interviewing young people and then composing their LinkedIn "portraits." Already Millennials have asked me for assistance on how to frame their professional experience for resumes and cover letters. They tend not to have a lot of practice organizing material to tell the story employers want to hear. After all, that's what it's all about in applying for work: reassuring those with hiring ability that you're the best bet.