There are hackers lurking on FB as anywhere on the Internet. They will often impersonate someone by going to their page and stealing their profile picture, and then they will go to that person’s friends list and ask the friends to friend them again. The friends think the old friend may have changed their account or something has happened and accept the new friend request.
After the hacker/new friend has obtained access to some people’s accounts, s/he will send a message to the person who accepted their friend request. S/he will try to get the person to send them money.
There is a way to make yourself less attractive to being impersonated. You hide your friends list. To do this, go to your profile page on a computer, not on a mobile device. Find the area with the pictures of your friends. It’s usually somewhere down the page on the left. Put the cursor in the upper right corner of the friends list area, and a chevron will appear. Click the chevron, and it will ask you if you want to edit something. Choose that. Choose “Me only” when asked who you want to see your friends list.
So what these hackers are doing is just impersonating people. They haven’t strictly speaking hacked your account. They don’t know your password. They don’t have control of your account. They’re just impersonating you trying to get money from your friends.
If you get a friend request from someone you are sure you’re already friends with, that is probably a fake account. Go to your own friends list, and check. If you are indeed friends, delete the request from the fake/hacker.
That is the biggest scam that goes around on FB.
Finally, those of us on Fluther who are friends with each other on FB call Fluther “the other F site.” It’s a kind of code. We don’t completely spell out the name, because a few people use the same name on both sites, and they may lose their anonymity that way.