In other industries, the government regulates that there must be a "Chinese Wall" (no communication or shared personel) between segments of a company that have

In other industries, the government regulates that there must be a "Chinese Wall" (no communication or shared personel) between segments of a company that have conflicts of interest. In this case, search and advertising qualify. I expect to see proposals for this kind of regulation in the next 10 years as the FCC begins regulating the internet.