I have lived here almost two years, and still occasionally get my bill loaded.
I take it in stride.
If you haven't been to DC, Rio, sao paulo, East side LA, Hollywood, Athens, Lima, Mexico border towns, Panama, Tenderloin, Manila, Angeles, Vietnam, Kings Cross (both), Rome, south Houston, Miami etc then at least keep your eyes open.
Do remember they drive on the other side of the road here- this is probably the most challenging aspect to drunk shermans.