Whoa... looks like Google needs to tighten up their security a wee bit.
I suppose the silver lining is that you need to visit a webapge that is booby trapped by the hacker who's trying to track you down... which may or may not be very likely to happen.
True, you would have to visit a site, but then people might have legit site and have the "code" in it then some hacker get the info from those sites.... like that never happen before *sarcasm*
I'm sure some webdev people would love to know where their clients would be and hopefully store in a safe place, but as we have learn of late, even some of the big company been "losing" client data due to hacks and well... poor data management.
Of course people would ask me "Why would vendors want to know where people buy stuff from?" why not? I mean we give out our zip code all the time. That is kinda "regional" thing and some people give fake data. This method (hopefully NEVER implemented) would get some REAL hardcore data that marketer would kill for. Actual location and can find out which city love to buy X items more than others, or even ordering pizza? deliveries? postal tracking?