That's called social engineering I think, I have seen this kind of thing before and it's a really scary scam because they befriend you into doing something and then when you finally let your guard down, it's all downhill from there. If more people learn everyday about this kind of scam, we will someday get rid of these petty scams.
You can find them online everywhere, because their job is to scam people. You will not be able to stop such criminal activities, but you will be able to prevent them from falling into the trap by warning people. Newcomers need to understand that no one in the online world should be trusted quickly, scammers always say sweet things to make them feel trusted. So it is very important to exopse their activities.
