[richardw]

Or phone number. My phone is linked to one in another country. I’ve been here for 3 years.

[lxgr]

Yep, same here. Fortunately they don't seem to use it for anything yet, somewhat begging the question of why it's there in the first place. (It doesn't need to be stored in a user-visible way if the only purpose is as a poor/annoying "proof of humanity" against sockpuppet accounts).

Update: I just checked, out of curiosity – seems to be gone now?

[piskov]

It was used to geofence access to some countries a few years ago, if I remember correctly.