I'd like to request that someone, anyone, at each meeting, remind us to
set our phones on vibrate and also to remind us to walk outside if we
intend to answer a call during a meeting.

We might also have a discussion here if anyone wants to debate that it
helps either the people in the meeting or the person calling the person
in the meeting to have a protracted conversation about how you are in a
meeting and can't talk to the caller right now. Isn't that pretty much
the only reason for an outgoing announcement in voice mail?