Last week, the city of Roanoke, Virginia, ended its brief and fumbled experiment with Flock Safety's Raven acoustic gunshot detectors (AGD) after 41 of the 75 approved devices had been installed—30 of them in the wrong locations. The messy implementation was a major factor, but the program had been dogged with concerns about invasions of privacy that have swirled around AGD technology since its introduction. Perhaps as important as eavesdropping abuse of AGD sensors is evidence that they don't work very well at their primary tasks. By contrast, evidence of crime was found in 7.6 incidents for every 100 calls generated by members of the community. Although the gunshot detectors are gone, Roanoke citizens concerned about privacy can't rest quite yet.