Yes, I think these are two discrete subjects. Most of your essay is about conditioned behavior (whether to refer to this as "addiction" is another separate question), generated by the technology patterns that mimic Pavlov's bell. Your subject is the de-conditioning process.

The second topic is a technology discussion, but it too is built on a psychological investigation, this time in the domain of social psychology, concerning the way in which other peoples' communications habits become yours through the "ethnomethodology" of conformism. It is easier to refuse others' modes of social communication if you provide an alternative, like reminding people you are accessible by email but don't use Facebook or Twitter. You can teach how to encrypt email, or use OTR in chat applications. But in the end you have to be secure in the knowledge that if people want to communicate with you, particularly, they will do so in the way you have made habitual with them. Their announcements, their proclamations, their territorial birdsong and conspicuous leisure and consumption reports, on the other hand, you may well miss. Also not miss, as the nature of your private space expands, and your internality expands to fit the sapce you have made for it.

It's this—the presence, absence and extent of the internality we came in the last five hundred years to call the self—that would be the common underlying subject of both essays. For the moment, this—the history of your condititioning and de-conditioning—is the chapter you are writing.