"Unnecessarily rude" is like "excessive force" or "inadequate approach", if you accept the expression you accept that the subject is wrong by definition.
I think that politeness is not an unalloyed virtue and that being rude can be useful. I am, of course, not saying that every time you have the opportunity to be rude, you should.
Since I'm quoting Greg Cochran, here's more on the topic.
""Maelcum a rude boy, Case." X-)
if you accept the expression you accept that the subject is wrong by definition
I don't agree. There is such a thing as being unnecessarily pedantic, but there are situations where pedantry is very much called for (say, reviewing the specifications for a communications protocol to be used in nuclear reactor software). There is such a thing as being unnecessarily sexually explicit, but there are situations where being sexually explicit is very much called for (say, while having sex).
I do agree that saying "unnecessarily X" carries a suggestion t...
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