You've been living with social media for long enough that you probably know most of the do's and don'ts. Don't post pictures of your debit card, or of your billionaire boss shirtless. But be careful when you use the word "home" too; people are watching.
WeKnowYourHouse.com is a recently launched website with an apt name. Basically, the site scans Twitter for tweets with location data that also make a reference to "home". From there, they can take the latitude and longitude, plop it in to Google Maps and get a reasonable estimate of your address. Lastly, they plot it on a map. It's creepy as all hell, but all just "a social experiment" according to the site.
Right now, all the most recent addresses they've posted seem to be in Ireland and the UK, but there wouldn't be anything keeping them from expanding, or keeping anyone else from copying their idea. They offer you the option to "opt-out" on the site, but you have to sign in with Twitter to do so, and give them some information when you do it. It's a little sketchy.
If you don't want anyone to be able to find out where you live on whim, your best bet is going to be to play it extremely safe with location data. You should probably just turn it off all together, especially if you never really use it for anything anyway. After all, if these guys can do it as a "social experiment" anyone else can do it for much worse reasons. [WeKnowYourHouse via Reddit]