What is going on 

HELP! What is going on?
I, an ordinary housewife from Rotterdam, have been bombarded with friend requests on Facebook since yesterday.
More than 700 requests in less than 24 hours, mainly from Pakistan, Dubay, Indonesia, Syria and Turkey. And it goes on, even now!
Hundreds of chat requests are also coming in. I went into it a few times in the beginning to find out what's going on, but their answers don't make sense. One is asking for money because his house has been flooded with water and his children are in danger of drowning, yet another says he loves me and wants to marry me, while another is sending hard porn to me.
Is there anyone who knows what's going on? This makes me crazy!