A new website, almost threateningly called icanstalku.com, is exposing the privacy hole left by many smartphones.

The site amalgamates twitter updates and modifies them to include the GPS data of where the information was gathered, posting maps and co-ordinates of where the person was when the tweet was sent with each tweet.

The site was created by a group of computer security professionals because they "don't feel that enough people realize what kind of data they are posting."

"After analyzing your photos, someone could find out where you live, who else lives there, your commuting patterns, where you go for lunch each day, who you go to lunch with, why you and your attractive co-worker really like to visit a certain nice restaurant on a regular basis," and other things.

Every time a smart phone with a GPS chip clicks to snap a photo, it automatically tags that photo with the exact GPS co-ordinates where that photo was taken. In many phones, this feature is turned on by default, and many consumers don't even know it.

For instance, the site notes that Nathan Cosby, an editor with Marvel Comics, took a picture of one of his drawings and posted it to Twitter around 12:40 p.m. on Wednesday. At that exact moment, he was in the middle of Cranberry Township, PA.

A Google Map shows a pinpoint of precisely where he was when he snapped the image.

It's all contained in a photo's metadata, which travels with the photo when it gets uploaded, e-mailed, downloaded or otherwise transferred.

"As a result, individuals often share too much information about their location, right down to the exact latitude and longitude, when snapping photos with their smartphone and posting them online,” according to the site.

Along with the site, the team relays detailed information for how to turn off the geo-tagging feature for each of the major smartphones, including iPhone, Palm, Android and Blackberry.