Foursquare doesn’t have any rules against adding your house as a venue. In fact, they have added a “Home” category just for it. But it’s important to remember that when you check in to your house, you’re not just sharing its location with your friends, you’re sharing it with the internet as a whole.
Since there isn’t yet a way to mark a location as private, every venue on Foursquare is public. It’s easy for anyone to find your address (or the latitude and longitude) of your house directly from its venue page.
Every time you check in somewhere other than your home, you’re letting everyone on the internet know you’re not there and exactly where to find your house if you’ve added it to the site. While PleaseRobMe.com (which posted Foursquare checkin tweets in the interest of exposing the dangers of sharing location information on the web) might have overstated the dangers of sharing your current location, imagine if that information were coupled with your home address in just a few quick clicks. Common criminals probably aren’t yet at that level of sophistication, but why test them?
Privacy issues aside, homes add a tremendous amount of clutter to Foursquare’s venue listings. If everyone adds their home to Foursquare, imagine how difficult it will be to find your favorite bar or restaurant, especially in densely populated urban areas.
If you need a location to check in to that lets your friends know you’re home for the night, try checking in to your neighborhood instead. It’s specific enough that your friends will know where you are, yet vague enough that the internet’s less savory individuals won’t have your exact address.