Why do I get unknown people from Friend Finder on Facebook?

Question by Don: Why do I get unknown people from Friend Finder on Facebook?
One time I got a friend request and I thought it was my family members from the Philippines, and it was a half nude lady that only had a bra and panties.
Now today, I thought it was my family from San Fransisco, well it was another lady that was whole naked showing a picture of her back body and only a thong.
Is there anyway I can block people i do not know from Friend Finder?

Best answer:

Answer by future_mathematician
This happens when you allow friends of your friends to see you on Facebook. Also it happens when you set your privacy settings in such a a way that everyone can see you. You can avoid it by setting your privacy controls. Also you can ban the people you have added by accident by removing them from your friend list.

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