"The under-treatment of pain is due in part to a kind of undesirable 'chilling effect.' The concept of a chilling effect, generally, is a useful law enforcement tool. When publicity surrounding a righteous prosecution 'chills' related criminal conduct, that chilling effect is intended, appropriate, and a public good. A chilling effect on the appropriate use of pain medicine, however, is not a public good. Recent research by members of the Law Enforcement Roundtable confirms that prosecutions of doctors for diversion of prescription drugs are rare.2 But, on occasion, overly-sensationalized stories of investigation of doctors have hit the nightly news. When that happens, the resulting chilling effect reaches far beyond a 'good' chilling effect on bad actors, and directly affects appropriate medical practice. The consequence is extreme, and not what law enforcement would ever seek – our parents and other loved ones who are in pain simply cannot get the medicines they need."

Source

"Balance, Uniformity and Fairness: Effective Strategies for Law Enforcement for Investigating and Prosecuting the Diversion of Prescription Pain Medications While Protecting Appropriate Medical Practice," Center for Practical Bioethics (Kansas City, MO: February 2009), p. 3.
http://www.fsmb.org/Media/Def…