A few weeks back it was announced that Twitter would have a location feature that would allow people who read your tweets to locate you geographically (longitude and lattitude). This caused a buzz among many political activists who were worried that if someone on the lunatic fringe of the opposing side didn't like what they tweeted they could track down the person.
Mashable is reporting (link below) that the Twitter Location Feature will be opt-in only. So the question is, would you opt-in to this? I would imagine that click and mortar companies who have a physical location that they sell out of and who tweet about their business would take advantage of this so that potential customers could find them. Can you think of anyone else who might opt-in?