It is naive:

Everywhere - a normal man, came to Moscow - became a fool. Not otherwise than the local buffalo generates a special wisdom field in which you will get - and immediately a fool.

Sorry, but this is yours. Simply, when the deterrent factors in the form of relatives and acquaintances disappear, it begins to behave according to its nature. It and evaluates everyone on its own, he in Moscow has everything around fools. Do you recognize anyone?