It is not rude to turn off your telephone by switching it on to an answering machine, which is cheaper and less disruptive than ripping it out of the wall. Those who are offended because they cannot always get through when they seek, at their own convenience, to barge in on people are suffering from a rude expectation.
Judith MartinA general rule of etiquette is that one apologizes for the unfortunate occurrence, but the unthinkable is unmentionable.
Judith MartinPeople think, mistakenly, that etiquette means you have to suppress your differences. On the contray, etiquette is what enables you to deal with them; it gives you a set of rules.
Judith Martin