This was (or maybe still is) one of the most troubling things about Twitter's location services feature. When someone tweets and chooses to share their location

This was (or maybe still is) one of the most troubling things about Twitter's location services feature. When someone tweets and chooses to share their location, the label appears something vague like "Pittsburgh" or "New York City". They may not be aware that the precise coordinates of where the tweet was sent, possibly narrowing down not just where they are, but even what room they are in, is shared with anyone and everyone.