I've traveled a bunch in the Third World and Europe, including some dangerous places (and was in fact interviewed once by an outdoors magazine on travel tips, since I was allegedly "bulletproof"). I evolved the Three Immutable Rules for Travel in Dangerous Places:
1) Never drink the water.
2) Be personally humble and dress nondescriptly.
3) DO NOT have sex with anything!
Like a lot of other posters, I invariably get asked for directions in whatever country I'm in. In Central America, I always go first to the local "Feed Store" and buy a local shirt (t-shirts with local beer logos seem to work amazingly well). The toughest place was Milan, Italy, where even the street people dress more stylishly than I do...I depended on my Sweetie to help me out with my clothes, and I was pleased walking across the big piazza in Milan that I looked like everybody else.
Depending on the country and what I see the camposinas carrying, I may buy a machete, a cane, a walking stick or something. Always learn to say "please," "thank you," "where is a bathroom" and "beer" in the local language. In Europe and the Caribbean I have visited dive shops and purchased a cheap dive knife WHERE LEGAL! Be creative...in Mexico City prepping for a climbing expedition, I dressed like what I was, a largely broke American climber...carrying an ice axe. Met a lot of Mexican climbers who agreed that only a fool would leave something valuable like an ice axe in a Mexico City hotel room!
Finally, eat the local food. Carry Imodium just in case...
Michael B