Hey Gerry...I know where your coming from..I always tell my friends who go to Jam that you need to know your pretty much seen as a only a walking dollar sign...
Some people(lets say Many) will come off as your BFF -but really ,when it comes down to it its about what you have $$$ and what they can get..I'm not saying ALL jams-there are some who would sincerely help you and not expect anything in return.This goes for foreigners living there as well...not just visiting tourists..