Of course, if someone has a violent ex or a stalker they should avoid posting their location and pastimes at all cost. What about the average person, though? At the risk of sounding paranoid, consider that a woman sharing the fact that she is, once again, enjoying her early morning run around a certain park could be easy prey to a rapist or mugger who happens upon this update. Someone seeking a home to burglarize might appreciate knowing that the guy who just bragged about the expensive television he bought last week is heading out of town for a long weekend.
Perhaps you think that even if you offer somewhat detailed info, people who don't actually know you would not be able to find your house or specific location. Chances are, though, that if you upload photos from your cell phone, you are providing pretty precise information. Smartphones embed all sorts of data in photos that you snap and tweet or upload. According to the online privacy awareness website, icanstalku.com, this data includes everything from the name of the photographer, to your camera settings to the location where the photo was taken.
This means that, along with information such as your work schedule ("Ugh, I have to work until 8 again tonight!"), your leisure habits ("It's Wednesday night! That means bowling at the Downtown Bowling Alley."), the type of car you drive and other tidbits that might interest unsavory characters, you are probably handing out your home address and other locations as well.