You shouldn't be too concerned about a few -- votes. Sometimes you might get it just because of the natural variation among people.

Something could get 100% positive responses only when no one actually read it. You're bound to have "outliers" or disagreement once a while in a free open community.

I think a reason why many people may choose not to explain their downvotes is to avoid escalating flaming war. It's easy to happen when people get defensive.

I would hesitate to establish voting guideline, let alone enforcing it, for the sake of diversity. The self-governing mechanism here seems to work fairly well so far.

In reply to Re: When to -- by chunlou
in thread When to -- by tcf22

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