No, I think social media are a remedy to a disease, the disease of compartmentalized, uneducated thinking. Just as reading or studying is considered beneficial to human understanding, communicating with other people via social media is similarly beneficial. Of course, studying and learning can be put to deleterious uses, but I believe that the predominance of people who intend to do good, creative things with their learning outbalances those who intend to do evil, destructive things
I think it's the best disease ever, if it's that. It's become a way to keep in touch with friends and families that didn't exist before. While some may become so immersed in online activities that limit their real world experiences, I think humans remain incredibly social and it's just another way to enjoy communication.