I suppose its possible though I can't say definitely. As far as who pops up, it could be mutual friends, same area, same interests
Sometimes Yes Other Times No so sometimes you will Show up in theres but Not all the Time tho It Depends on the Information thats Listed Between yours and there Profile
If a person is a friend of a friend then Facebook might recommend them as someone you know. That person can't see your things that are not public, but you might be recommended as their friend.
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USA and other governmant try to watch you and keep you below facebook is lie