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. . . and thinking of it as a giant database, it would be difficult to have folks unsubscribe without setting policy for how their user information would be represented when they are gone while still keeping their posts visible.
I'm mostly a lurker. I haven't much to give or take on that site. I do use this site a bit. I'm old and analog. I drive 90s and earlier rigs. That forum is way beyond my feeble knowledge and expertise.