I'm guessing most family members are most likely not going to ask the question on facebook instead of just call their loved ones or send a text or email. My personal line of thinking is (maybe check facebook if they're super active to see if they said they're ok). Send a text or email if I'm a little worried. Call if I'm very worried. After a text or call I wouldn't go back and push the ask button on FB.

You always had that though. And you can't automatically answer it for users from device activity because that would violate someone's privacy.