The way I see it, what’s truly impolite is allowing people to walk away from discussions unclear. Real togetherness of a group is reflected by the responsibility that all take for defining the real things to do and the specific people assigned to do them, so everyone is freed of the angst of still-undecided actions.
Again, if you’ve been there, you’ll know what I’m talking about. If you haven’t, test it out—take a small risk and ask, “So what’s the next action on this?” at the end of each discussion point in your next staff meeting, or in your next family conversation around the dinner table.