Originally Posted by
BearX220
Never in hell. You'd be insane to announce your home is empty and unattended to the Internet.
Foursquare requires neither your full name, nor your address. For name, I gave them my first initial. For location I gave them the state. So all they know is that Z from North Carolina is within X meters of a given Priority Club or Doubletree property. Which most of the time is right near my home, so I'm not even out of town.
Also, when checking in, there is a toggle to deny sharing of your location with friends.
Edited to add: also in the Foursquare account settings you can deny all the the various possibilities to display your location. The defaults are to display your location, so it is necessary to go to settings and uncheck the assorted boxes.