It is practically considered bad manners for either party to field a realistic candidate against any of these three men.
Calling half an hour or less before the start of a meeting to change the time is considered bad manners.
In this city it isn't considered good manners to notice.
This is called 'after', and considered bad manners by some people.
But it's considered very bad manners to cut somebody off unless they've actually gone to sleep, turned violet, or started making love.
In some countries, it's considered bad manners to eat in the street.
It was not considered good manners to assassinate the Emperor, of course.
"It's considered bad manners to interfere with a quest, but it happens now and then."
However, if these can be incapacitated without being killed, it is considered good manners to do so.
It would be considered very bad manners to say such a thing in Russia.