Hell, Whitey Bulger would have been caught years earlier if the city fathers of Santa Monica had built a database of all its citizens and then sampled the effluence coming through its sewagetreatmentplant.
Other times the attacks are more personal:In 2000 a discontented consultant, rejected for a job at a water treatmentplant in Australia, remotely hacked into a sewagetreatment system and released 264, 000 gallons of raw sewage into rivers and parks.