According to an article on Folha de São Paulo, there is a specific gang that targets iPod owners. A man and a woman appraches the victim, being attracted by the white Apple earphone, and steals the iPod device. I don't know why I still get surprised by such a news.
BTW, just recently I knew that there is an iPod index to compare the purchasing power among countries. It happens that Brazil is the country where you find the most expensive iPod device in the world. Yup, in the whole world. For example, while an iPod Shuffle 1Gb costs between 60 and 70 dollars in the US, you won't be able to find it below $210 in Brazil - well, at least where it is supposed to be legally imported.