[RS-232]

> If you put someone on speaker without introducing everyone present then they should hang up on you.

This is silly. Just tell the person you are talking to that they are on speaker.

Assuming the party on the phone has been informed and the volume is not excessive, having a conversation on speaker is equivalent to having a physical conversation in person.

[follie]

Silly is not explaining why you can't put your phone to your ear like a polite person who follows etiquette. Polite people naturally won't really just hang up, ones that know etiquette will pretend its more convenient for you to call them back when you can and others will just note you are rude.

[RS-232]

Silly is not explaining why you can’t just pass a handwritten note like a polite person who follows etiquette. Polite people naturally won’t really just start speaking out loud; ones that know etiquette will pretend it’s more convenient for you to read their note when you can, and others will just note you are rude.