My dad was the baby. When he was born they were already successful. They sent him to business school - he probably would have loved to have been a poet or a writer or something, and he was very creative.
Anyone can use these sites - companies and colleges, teachers and students, young and old all make use of networking sites to connect with people electronically to share pictures, information, course work, and common interests.
It's more fun having him as everyman in the 25th Century. It is better to concentrate on what this planet will be like 500 years from now, and not be dealing with little aliens in space and all that related stuff.