1. No communications technology is a neutral tool; all have their inherent strengths and weaknesses. As McLuhan said, "The medium is the message." For example, TV favors the image over the word. See Neil Postman, Amusing Ourselves to Death.
2. People tend to not intellectually engage mediated technologies as deeply as unmediated means of learning. It takes more concentration to read a book than to scan a screen--and people do tend to scan screens more than carefully attend to them. See Mark Bauerlein, The Dumbest Generation.
3. I have never been a Luddite. I have had a web page since the mid 1990s; I was the first professor at my school to have a fully functional web page for a course; I have a blog; and so on. However, I am not a techno-cheerleader, but a critic. But critics are often taken as heretics by those so immersed in technologies that they lose any sense of distance or perspective.
4. The answer to the problem of media oversaturation is not to have no contact with the Internet, cell phones, etc., but to use them wisely, realizing their potentials and limits. It is also wise to abstain from these technologies from time to time in order to better understand how they affect your thinking and feeling.
5. Writing a blog post that recommends that people unplug is not a contradiction, since by unplug I simply mean this: spend less time in technologically mediated environments and more time in unmediated environments. See point #3.