[Hehe]

Sao Paulo is a dump imo. I've been there 3 times, once alone and twice with parents visiting their friends there. Parents' friend had body guards (yes, body guards) on a 24hr basis and even then it didn't provide much a sense of security.

Then when I was older, I traveled there alone backpacking South America... and the things you see on the streets can be almost shocking and I think that's an understatement. And this is from a person who gets by with basic conversation skills in Portuguese... they seemed much more rude (especially local young people) toward foreigners.

I'd avoid downtown SP at night time at all cost. Poorer areas on the outer rim of the city is dangerous day in/out without a local guide. If anything, stick with the green line. I'd actually recommend to hire a local guide who knows their shit to guide you around and make sure you stay out of trouble if you really want to see the city. I had a Brazilian friend who I was backpacking with, and he got us out of trouble encounters so many times.