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Communication bridges the gap between people (there is no real gap but it seems like it based upon physicality). A meltdown in a parking lot assumes there is a separation. See to it that your words or lack of words do not become a flood that washes away the bridge, leaving you stranded on the far shore.
Where has a lack of common courtesy (and common sense) sabotaged your communication efforts? Does your organization send out customer correspondence that reads like it is “yelling” at the customer?