Most likely your Facebook have contacts you do not know, beware that can be people who have bad intentions. To block these people trying to pry into your life and be very aware of what you do or do not do, you must follow these basic steps entering the settings of Facebook.
To start this process you must know the name of the people you want to block, when you’re ready it should go in the option icon shaped “down arrow”, then a series of option which should give click “open settings “. You’ll notice that a number of options appears on the left side of the page must choose the fifth option that says “Block”.
Once done many options appear, here you simply headed Block then users will notice below is a space where you should put your name or email address of the person you want to block. Once finished just have to click on the blue box “Block” and ready that would be it. To return to your profile you give Facebook Click to logo is on the top left.
Blocks people simply do not know should be aware of what we do right now in Facebook. Blocks people who only seek to invade your privacy.