Privacy harms taxonomy: collection, processing, dissemination, invasion Privacy Harms: A Taxonomy of Where Things Go Wrong four families of harm, in the order data flows through a system DATA FLOWS THIS WAY 1. Collection watching and asking Surveillance always-on tracking Interrogation forced questionnaires Insecurity careless storage Over-collection grab everything fix: minimize at source collect only what serves the stated purpose 2. Processing combining and scoring Aggregation mosaic from pieces Re-identification re-linking the anonymous Secondary use new purpose, no re-ask Exclusion no say, no appeal fix: purpose limits retention caps, real deletion on withdrawal 3. Dissemination spreading it around Disclosure true facts revealed Exposure intimate life laid bare Blackmail leverage over victims Distortion false, unfair portrait fix: breach discipline access control, audit, no silent sharing 4. Invasion intruding on the person Intrusion unwanted watching Decisional push nudged, scored, filtered Exclusion spiral score locks doors Chilling effect self-censorship fix: appeal paths human review, opt-outs that actually work harms compound left to right: collected once, processed many times, spread widely, felt personally