Be careful of scammers, they are all over the net. I found some friends get their Facebook account hacked by scammers, some used their photos to scam friends. They would resort to different kinds of scamming tactics from asking for cellphone load to asking money or donations and a lot more.
Be careful in having transactions especially if it involves money, even if they are supposed to be coming from your "friends" because you never know if they are real of just posers. Do not trust anybody until you talk to them on phone or do something to really identify them. These people are heartless and they spare no one!