A circle with a 690 meters radius is about half a square mile. The top 50 most densely populated cities according to Wikipedia all have over 20,000 people per half square mile, and that includes lots of European cities and even one in the United States:
On the other hand, it says that 690 meters is the average. I wonder if the accuracy is higher or lower in more densely populated areas. My uneducated guess is that it would be higher and that you'd actually have a more accurate location for densely populated cities.
I break into a site you use often and get a lot of personal information on you, but not enough; I can see approximately where you live, and go through your trash to finish up my collection (e.g., rifling through garbage to find SSNs, etc.)
If you look at my IP, I'm working in Delaware, but I'm actually sitting in Colorado Springs. It's not evil, but I'm not gonna be too happy if you advertise a "local" deal.
oh god, so this means that because I'm hosting a VPS for some italian, they think that prgmr.com is in italy? it sounds like an even worse idea than looking at the address in the whois.
Abstract: http://www.usenix.org/events/nsdi11/tech/techAbstracts.html#...
Paper: http://www.usenix.org/events/nsdi11/tech/full_papers/Wang_Yo...