Corporate Globalization

From Wal-Mart to Microsoft to McDonald's, the trend of corporate globalization has been exploding. There are good and bad side effects from these trends. I feel the negative side effects outweigh the positive side effects, but I am interested in seeing a legitimate argument for or against corporate globalization. Is it immoral, unethical, or wrong in any other way? Or is it just bad for the consumers, but otherwise permissible? Is it just "good business"?

I suspect a majority of the readers will find corporate globalization to be negative in some respects, and if so, what can or should an individual do?