People could have all social interaction with their internet websites, social media platforms and blogs. They can create a fake persona or brand. If they spend significant time managing this, at what point does their online persona become the dominant one? At what point is that the real person?
I don't think it becomes real, but it can become dominant. The true, real life personality will become atrophied and underdeveloped. The Internet allows us to tell the greatest lies about ourself and mostly for personal enjoyment.