It's not a safe place even with the presence of policemen everywhere, btw. At night, people will warn you: "Don't hold your camera at hand, someone will take it away and run." But it has not happened to me yet. In small towns, it is relatively safe. 1/3 of 30000000 population is in Buenos Aires, the capital. In such big country, no one grow vegetables and large areas are not used at tall.