In fairness, they only seem to drift off after the useful part (when there actually is one) is done.
Think of the threads as business meetings.
We all sit around the table listening to two or three people being (incredibly) productive, whilst the rest of us struggle to maintain consciousness and/or sanity.
Then when the meeting's finally over we all get up and start chattering about whatever we where thinking about while we waited for the meeting to finish.
This incomprehensible hubbub leads line-managers and hod's to believe that, while only a few attendees seemed to be engaged in the discussion, everyone found the meeting useful, informative and inspiring.
Just look at the current thread discussing Fedora. Currently three pages of intelligent informed discussion about Fedora to impress the overlords at Future.
Anyway, it's forecast snow up here tonight, I think this is the fifth or sixth time so far this winter they've forecast snow and it's rained every time.
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