Precisely the point, exude a little attitude, but keep it measured, reserved even. Don't go looking for trouble, and don't make it easy for the thieves.

Sounds like your friend would've fit right in here in New York, at least the parts I travel in.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)