Remember, "personal" details also extend to plans and issues that take you outside of home. Given enough data someone could harvest enough information about you to learn where you live, perhaps even your name and town. So announcing "We're leaving this weekend for a week long trip" may just give someone an opportunity to visit your empty house.

Or even announcing the death or hospitalization of a loved one can clue them in to your residence being unattended for a while.

Data harvesting is very real and it's surprising what facts you can glean from seemingly innocent comments.