...
Concern about harm to small businesses, because of information being spread that there was a COVID infection there. Larger businesses will be able to cope, but small businesses will have less resilience.
Health status stamps (if implemented)
Could be problematic, and lead to the App becoming de facto mandatory, even if that was not our original vision.
...
May not respect our vision that private data should only be shared with consent.
Reckless beahviour behaviour due to misinformaton misinformation (False Negatives)
Particularly if the app is not very careful to indicate the limits of information it has (e.g. perhaps there is no HA data downloaded, or perhaps no location data has been recorded by the App).
...