StackOverflow took on a tough challenge in getting its members to self-curate the body of questions on the site. They were smart to recognize that "more isn't always better", and thus gave moderators an incentive to identify and close off-topic questions.
There's nothing wrong with that idea, they just have a bug in the implementation. Somehow they've incentivized the closing of good questions that are frequently on-topic.
It does happen, but you picked a bad example. Read the close reason: " Questions about general computing hardware and software are off-topic for Stack Overflow unless they directly involve tools used primarily for programming. "
StackOverflow is for programming questions. That question, as it was formulated, is not about programming. It belongs on either Unix&Linux or Super User instead.
There's nothing wrong with that idea, they just have a bug in the implementation. Somehow they've incentivized the closing of good questions that are frequently on-topic.
Here's an example of a plainly on-topic-yet-closed question that annoyed me recently: http://stackoverflow.com/questions/2847655/find-threads-runn...