In Rome be a Roman

This proverb---"In Rome be a Roman", is quiet true in a lot of cases. But i dont understand the ethics and crap that is enforced by the governments. The latest to be in the news is Alcoa, the 3rd largest third aluminum producer in the world. Lately its under fire from the justice department over allegations the company bribed officials in Bahrain in an effort to obtain business. This is what happens in almost all the asian countries. Never knew its happening in the middle east too. I dont see a logic as to why US justice dept is after Alcoa. Its between the company and bahrain government and if corruption thrives in their kingdom, they better go after their own corrupt officials and not after this company. If the company tries to be a saint and follows all the rules then it better shut down its door on day 1 as they will go nowhere. Let them come to india and use the saintly characteristics and approach the government keeping in mind all the rules and regulations. It will be a joke and i will have the last laugh!!! Its high time they enforce this proverb legally and define that its ok to be unethical outside as long as the "unwritten law" of the land is followed :D