The Future of Us, by Jay Asher and Carolyn Mackler

Pretty terrible YA. Set in 1996, the book is based on the ludicrous premise that annoying character Emma's new computer can access Facebook 15 years in the future. Not liking what she sees for herself and her best friend Josh, she blithy proceeds to screw with the future in a way that Doc Brown would seriously disapprove of. This is because she is a selfish and thoughtless bitch. Josh is kind of dumb. The book was bad.

This is how Doc Brown would look at these chuckleheads.