Here on Stack Exchange we're encouraged to be nice, but I feel like the canned messages from mods and from the system aren't setting a good example in this regard.
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This message is direct and impersonal to the point of rudeness. It isn't really an explanation; it's a rebuke.
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This isn't as rude as the comment message, but it's pretty impersonal, especially with the passive voice in the last sentence. It could be more polite.
Maybe there are better examples than the above two. I'm proposing we have the discussion. Are we encouraging politeness with mod messages and system messages? Can we do better?
A good example of a company choosing friendliness over, we might say, succinct communication, is the Slack release notes. They could say
Improved look and feel of HTML notifications.
Instead, they say
We've changed the look, feel and texture of our new HTML notifications. Give them a try! They're delicious.
The second is longer, to be sure. It's also friendlier and more entertaining to read, and I'll bet a lot more people read the release notes of Slack than the release notes of software that uses the first style. These release notes have a personality.