It works both ways. My nephew has been a (contract) meter reader in some really rough neighborhoods. After getting scared a couple of times, he went to training, got his CCW, and carried concealed while making his rounds. No further problems. Maybe the bulge at his side made a loud statement.
A lound statement for what - intruding on people's property at the point of a gun to install something they believe will harm them, rather than backing away and letting the company pursue legal means?
He has no warrant, he has no cause other than to leave when ordered. Period. In fact, why wasn't he fired for packing heat to do his job? Is he bonded? Will the company back him up for shooting someone who orders him off their property, when he refuses to leave?
Your ignorance is astounding. And if your "nephew" really exists, he should be fired, before someone blows his ass away for threatening them with lethal force on their own property.
Carrying a gun will get you fired quicker then you can spell gun when reading meters.
You may carry mace to use against dogs but that is it.
He better keep his lips zipped