[dredmorbius]

No, the privacy issues aren't negated.

If you opt in, you have no privacy.

And if this does become ubiquitous (I suspect it won't, but that's just me), opting out will be painful. Very painful.

No thanks.

[adamjernst]

Opt in per store.

[dredmorbius]

This also predicates having location disclosure enabled on your mobile device.

Thanks, but no.