Widespread drug use in the workplace generates a number of serious management problems. It affects absenteeism, morale, and the quality of the products and services companies provide. There are many accounts of drugs being sold on work premises to and by employees. Efforts by concerned individuals and managers to stop these activities are often met with violence and intimidation. Some companies have resorted to drastic law enforcement actions in an effort to bring this criminal activity under control : the use of "drug-sniffing" dogs, body searches, searches of personal property and lie-detector tests are becoming more and more frequent. The mere presence of criminal activity in a work environment breeds suspicion, both by co-workers who want the activity stopped and by the criminals themselves who fear being caught and prosecuted.