Back in 2011, we reported on some domains Rockstar had registered that we thought might be for GTA V. More recently, you may have noticed lifeinvader.com appearing on the official GTAV website, confirming our suspicions that it may be used for a teaser site. Today, Rockstar have launched an actual website for Lifeinvader, an obvious parody of Facebook.
Clicking the logo or visiting the homepage will take you to a random profile on the site. You can login to the site using your Social Club details and "stalk" people there and comment, exactly as you do on Facebook. Many of the profiles contain screenshots, so spend some time browsing around and see what you can find.
Interesting to see that you can stalk businesses for deals, we're hoping this actually applies in-game as it's an excellent point of integration.