To those who ask for sources, I remember a recent case where a reddit user had his data handed over due to the GPS coordinates harvested through the reddit app. I don't remember where I read it though, so someone may find the link.

EDIT: Couldn't find the link explaining how GPS data was related to the case, but I remember it was related to this https://www.eff.org/press/releases/redditor-wins-fight-stay-anonymous