A strong example is Strava's Global Heatmap, which visualized activity recorded by users of Strava's fitness-tracking app. In 2018, researchers found that these aggregated location patterns could reveal sensitive military sites, raising ethical questions about privacy, informed consent, and safety.
System: Strava uses smartphone and wearable-device data, including GPS location, time, and movement, to track activities such as running and cycling. Its Global Heatmap combined users' activity data to show popular exercise routes.
Example specifics: In January 2018, researcher Nathan Ruser demonstrated that concentrated activity routes appeared around military facilities in countries including Syria and Afghanistan. Although individual names were not displayed on the global map, repeated routes could expose base layouts, patrol patterns, and frequently used locations. Strava subsequently strengthened privacy options and restricted heatmap visibility in sensitive areas.
| Ethical issue | Why it matters |
|---|---|
| Privacy | Aggregated or apparently anonymous data can still reveal sensitive information when patterns are combined. |
| Informed consent | Users may have agreed to data collection without understanding that their routes could contribute to a public map. |
| Power | Strava controlled how user data was processed and displayed, while users and affected communities carried many of the risks. |
| Safety | Data collected for personal wellness created unintended security risks for military personnel and nearby communities. |
Impacts included the exposure of activity patterns around sensitive locations and changes to Strava's privacy controls. Implications include the continuing risk that health data may be reused for purposes users did not anticipate, alongside opportunities to improve exercise, community planning, and public-health research.
The common misconception is that anonymized data is automatically safe. In reality, location patterns can enable re-identification or reveal sensitive group behaviour even without displaying names.
Exam technique: This example applies to the health context and is shared by SL and HL. For an evaluate or discuss response, explain the system, distinguish impacts from implications, compare stakeholders, and weigh health benefits against privacy and safety risks. Do not merely name Strava or attach concept labels without analysis.
