With so many blogs singing the praises of beautiful Cuzco, Peru and giving great advice on what to do there, what about advice on what NOT to do? That's where I come in! As a traveler who has had a mishap or two, here are a few pieces of advice of things you should avoid if you've asked yourself "Is Cuzco safe"? : DON'T come to the city not knowing much about its history. It…