Have you ever received unsolicited messages from someone you don’t know on Facebook? What about friend requests? If so, then you know how annoying they can be. But you don’t have to put up with them, Facebook has a privacy setting that will block unwanted strangers, creepers, and stalkers for good.
Login to your Facebook account and at the top-right of the page click the down arrow to Privacy Settings.
On the settings page next to How You Connect click the Edit Settings link.
A pop-up appears with three different settings to adjust. If you don’t want anyone to find you uninvited, then check the Friends option for each drop-down box. You can customize these settings to suit your preferences, but remember that Friends of Friends is essentially the same as Anyone if any one of your friends has a large amount of contacts.
Now if you put all of the settings at Friends you won’t receive anymore unsolicited messages or invites, and it will help minimize stalkers.