People look at me funny where ever I go- more in the USA than in Argentina-I never guessed it was because I am a foreigner.
Although I did spend a few quarters at the University of Mars...
I think its completely irrelevant what you wear.
Its how you rock it that counts.
much more important than clothes, a few things that will get you in trouble in Buenos Aires- most of which will get you in trouble in LA, Rome, Bangkok, or Atlanta, too.
Dont wander around drunk out of your mind at 4AM.
Dont try to buy drugs on the street, or in clubs, from people you "just met".
Dont flash your Rolex or your fancy DSLR in poor neighborhoods, after dark, or in crowds.
Maintain what they call in the military "situational awareness"- which means- pay attention.
I have had my bag slit in Rome, my wife's purse grabbed in Madrid, my wife's purse snatched out of her convertible in LA, a pickpocket try to grab my wallet on a bus in Bandung, Java, and people flash knives at me in Seattle.
There is nothing unique about Buenos Aires, and the pickpockets are definitely worse in Naples.
If you dont do stupid stuff, 99% of the time you will be fine.
Now if you want fashion advice, thats different- I, for one, will tell you that you look like an idiot wearing those cargo shorts past your knees, the OBEY T shirt, and the Tevas, but thats just me.
I also have bought lots of perfectly good clothes in Argentina- I just dont buy cheap crap at chain stores. There are some great quality mens clothes out there, if you look. Same for womens. I have certain pieces of clothing I bought in BsAs that I wear the shit out of, all the time, and they hold up fine.
I have other stuff I bought at Zara that fell apart after a few washings.
Good stuff is there, if you look for it...
Oh- and I wear hats every day. Everywhere I go. Never had a problem with it, except some cab drivers compliment me on my sombrerito.