Hopefully it's not just keeping every single person you pass near for 5 seconds. One of the countries that did Bluetooth tracking like this had a minimum amount of time you had to be near that person I think. That might be up to the app using the API and not the API itself though.
Well, it'd be neat if the spec on exactly how all this is intended to work was
publicly available for all to read, to answer such questions. Such a spec, if one were available, could say things like this:
The public health authority will define the way in which the app determines if someone has been exposed. To support this the system provides apps with both an estimate of time the user has been in contact with someone who has been diagnosed as positive for COVID-19 and the approximate distance between the users. Public health authorities will set a minimum threshold for time spent together, such that a user needs to be within Bluetooth range for at least 5 minutes to register a match. If the contact is longer than 5 minutes, the system will report time in increments of 5 minutes up to a maximum of 30 minutes to ensure privacy.
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It will collect user postcodes in the UK. Do your research.
I’m ok with the functionality but you can’t be like the tin foil hat folk and deny the facts.
The comment you replied to says, "Nope, the API prohibits collecting user data, prohibits GPS, and anonymizes contacts."
If you have evidence to the contrary,
you will need to provide a citation. I've searched the spec for the API and don't find "UK" or "postcode" anywhere in it (which is as expected, as everything I've read goes against the idea of collecting such information). That might be something that a government app
built on top of the API might collect. That is different than the API itself - which is what the comment you quoted specifically mentioned. Last I heard, the UK was going their own way, rather than using the Apple/Google-developed OS-level API. If you google "uk apple google contact tracing", you'll find all sorts of reporting on the UK
not using the API, and nothing newer suggesting that they've changed their mind.
As you say, getting facts right is very important. Please so do.