Have you ever received any friend request from an unknow girl in facebook , if yes then beware may be that profile is fake and you may be targeted by someone using those profiles, Before you approve that friend request check all below points to ensure whether that person is real or fake.
Friend Request – Very first sign is he/she will send you friend request.So dont add any unknow person if you dont know him/her personally.
Profile Picture – Fake profile generally use photos of models ,sexy looking girls pictures ,or photos copied from other user albums.
Fake Profile generally have either only males or only females .
How many Friends - If it has many friends from all over the world (no specific region)!
Fake profile owner will never reply your message .
You will receive lot of application request from those profile ,if this happen then that profile is handled by application owner to spread the application.
Hackers also used fake profile to spread virus and harmful links , if any unknow person post harmful link in your wall then immediately delete that person, because facebook may banned your account for spreading that links even when you are not involved.