This thread of Hacker News kvetching has really lost focus on the case against open offices. This reads like a contest of who can be the most uptight in the office.
I go to work to well, work. I like my co-workers, don't mind talking with them a bit and am even friends with some of them. That doesn't mean I want them to bring all their distractions and things that bring them joy to the office. I want us all to get everything done quickly and correctly so that we can all go home and enjoy the things we like.
This sort of outlook might work for those of us that are workaholics, but for everyone else it's a major mental health hazard. Not everyone has wives or children or partners or scores of friends to spend their nights with. I wouldn't be so blase about taking all enjoyment out of the rest of the time those people are spending on this earth.