* People worry about a new feature
* The feature sticks around and people do get more comfortable with it (this is where Zuckerberg ends)
* At some point the initial fears are realized and people become eternally disenchanted with the feature
So for example he mentions the Wall.
* People were nervous about the Facebook wall at first because they thought putting so much information about themselves in one easy to locate place was a bad idea.
* People got more comfortable with it because it was forced on them and nothing bad happened.
* Now what I'm starting to hear is more and more companies are requiring applicants to friend them when they apply for a job. Every person who told me an employer asked for access to their Facebook page has also told me they regretted some of the things on their wall and would be wary of it in the future.
So I see a backlash at the end of the road here. One Zuckerberg (understandably) doesn't want to face.