Last year, Stanford banned its physicians from giving paid promotional talks for pharmaceutical companies. One thing it didn't do was make sure its faculty followed that rule. A ProPublica investigation [Dollars for Docs"] found that more than a dozen of the school's doctors were paid speakers in apparent violation of Stanford policy - two of them were paid six figures since last year. Conflict-of-interest policies have become increasingly important as academic medical centers worry that promotional talks undermine the credibility not only of the physicians giving them, but also of the institutions they represent. Yet when it comes to enforcing the policies, universities have allowed permissive interpretations and relied on the honor system. That approach isn't working. Many physicians are in apparent violation, and ignorance or confusion about the rules is widespread. As a result, some faculty physicians stay on the industry lecture circuit, where they can net tens of thousands of dollars in additional income. Critics of the practice say delivering talks for drug companies is incompatible with teaching future generations of physicians. That's because drug firms typically pick the topic of the lecture, train the speakers and require them to use company-provided presentation slides.