is always opt-in.  No location information is ever sent without your permission.  If you wish to disable the feature completely, follow these steps:
seo rud a dh'fheumas tu a chur air an-còmhnaidh.  Cha dèid fiosrachadh mu d' àite a chur a-null gun do chead idir.  Ma tha thu airson am feart seo a chur dheth gu tur, dèan nan leanas: