On: Microsoft Band

[SideburnsOfDoom]

Not just health - also location, activity levels (meaning a reasonable guess at to if you're awake) etc. This is basically a tracking bracelet.

Also "can be mined" is putting it mildly. Apple, Microsoft and google are all NSA partners. If the data's there, the incentive is to utilise it....

[crocowhile → SideburnsOfDoom]

Those are all pretty much data that are available already to whoever is accessing your smartphone. Google has been tracking activity and location for years now https://maps.google.com/locationhistory/b/0

[SideburnsOfDoom → crocowhile]

I'm not disagreeing with you; but this is not an argument in favour of going further down this road by using a bracelet instead.