Workplace surveillance has been a controversial subject for as long as there have been workplaces. Advocates of surveillance insist that it is essential for productivity, quality control, and (in some cases) safety. Further, they'll insist, employees have no inherent right to privacy at work. Opponents of workplace surveillance argue that the practice actually is counter-productive; employees feel as though they aren't trusted, which lowers their morale and, inevitably, their effectiveness. Technologies such as video cameras, electronic ID badges, and keylogging software have made it easier for employers to track workers' locations, activities, and physical output.