Protocol is etiquette with a government expense account.

When virtues are pointed out first, flaws seem less insurmountable.

It is a widespread and firm belief among guests that their departure is always a matter of distress to their hosts, and that in order to indicate that they have been pleasantly entertained, they must demonstrate an extreme unwillingness to allow the entertainment to conclude. This is not necessarily true.

One of the big no-nos in cyberspace is that you do not go into a social activity, a chat group or something like that, and start advertising or selling things. This etiquette rule is an attempt to separate one's social life, which should be pure enjoyment and relaxation, from the pressures of work.

When people start hurling insults at you, you know their minds are closed and there's no point in debating. You disengage yourself as quickly as possible from the situation.

You think death is any better an excuse for desertion than any other?

For email, the old postcard rule applies. Nobody else is supposed to read your postcards, but you'd be a fool if you wrote anything private on one.