I live and have lived in several cities in the southern cone of South America. Never once in my life I have seem or heard of people rioting in the streets and burning shit up.
I'm in my mid-20's, btw.
Moving the goalpost is quite easy, but it just means you were wrong.
Here's another one for you to move the goalpost around.
http://news.bbc.co.uk/1/hi/world/americas/7868727.stm
The protesters had set cars and tyres on fire to blockade streets in the slum, which is home to about 80,000 people and sits next to some of the city's richest neighbourhoods.
Are you going to say Sao Paulo is not in Southern Brasil now ? Maybe I should be looking only at the little town of Chapeno (with the ~ on the n) ?