I have another question (and I really don't mean it as snarkly as it'll sound) - if you are trying to keep yourself hidden - why are you posting to a social network (Path) and an aggregation site (hn)?
That doesn't really make sense now, does it?
Seems to me there are two different questions here.
1) Access. 2) Sharing.
I expect most people would be fine with an app accessing location data in order to present sharing options (Tag?) or respect previously expressed intent (Always tag! / Never tag!).
The problem comes from the app automatically sharing what it has accessed without prompt, seemingly against the expressed intent of the user.
I think the question here is pretty important, even if this particular case seems trivial.