Good question! Actually Facebook is now kind of a numeric ID. Even if you are not so close with your Facebook friends, you probably have seen them in the real

Good question! Actually Facebook is now kind of a numeric ID. Even if you are not so close with your Facebook friends, you probably have seen them in the real life already. And before going to a visit a friend of friend, you can send a message to your friend just to check if the guy is not "scary", as you said ;) We also have a feedback form which will increase the sense of security. Let's imagine you're reluctant to hang out with new people. Check their Facebook albums/profiles before won't bring any sense of security for you?