Location-based social networks: new threat

EFF run article about new facebook places product. Well this new things so called location-based social networks which allow you in form of game share your current location and places your have been. I don't get it, really. Why would you want share you location with the world in the first place? If you want go to a club with friends why not just call them or send them a private message? This just stupid. Imagine someone hacked your foursquare account and trying to set you up for suspecting in robbery or homicide case check-in in the crime scene on the same time as crime goes. This sounds like a paranoid  bullshit but are your sure you want that sort of troubles? Because again this type of information will be used against you sooner or later. My recommendation is not using this type of service