On the outskirts of Buenos Aires, in the more affluent neighbourhoods, there are a number of countries - gated communities (they call them countries, spelt the same, pronounced koontrees) that keep all the riff-raff out, supposedly. They're growing in number and size and are a popular choice for those with money. This is not the gate for one, it just reminded me of them.
Here in the city, however, everyone has gates, doors, locks, covers over windows, bars, alarms... Most of the doors are auto-locking even, I've seen very few outside doors that you can unlock and leave open. This is in the city, of course. Much of this feeling disappears once you leave the city - our weekend in San Clemente had a very different feeling about it (though you're encouraged never to let your belongs leave your sight anywhere in South America). Sigh. The wants that materialism brings.