GPS is everywhere

There has been all this talk in the media lately about GPS systems in which you can basically be tracked anywhere on earth now. Google has introduced
"Latitudes" in which you can broadcast your location to a list of friends(that you give permission for). Twitter on the iphone also has the option to broadcast your location via Google maps, so viewers on your site know where you are located. I was on a photoshoot this weekend and updated via Twitter which directly linked to my blog.
There are also other new sites such as www.loopt.com which is only available in the states right now. I guess there are some advantages to having everyone know where you are at any given time. Here's a site that tells you where certain crimes have occured with your area:
www.spotcrime.com/on/toronto.