Why are people so eager to invade their own privacy?

Rochelle Gurstein in The New Republic:

What astounds me about today's metaphorical glass-house dwellers—those people who eagerly publicize on websites every detail of their "health" (DNA profile), "finances" (shopping bills and consumer preferences), "family situation" (online dating profile)—is how cheerfully they participate in "one of the most horrifying aspects of modern life." Self-invasions of privacy on the Internet now compete with "bureaucracy with its documents" and "the press with its reporters" for a place on Kundera's list of the institutionalization and I would add normalization of this "age-old form of aggression." And so, too, it seems to me, do all those glass apartment houses which sprang up everywhere in New York City during the glory years of the last building boom. I am still baffled as to why architects thought it was a good idea to erect pricey, luxury apartments without solid, exterior walls on streets that are exposed not only to the casual glance of thousands of city walkers from below but also to the unavoidable notice of those who live or work in the many neighboring buildings, and that a new breed of fashionable New Yorkers couldn't wait to live in them.

More here.