I have been using P2P since how many years, i have never experienced anything as such, whenever i initiate P2P order make sure that my funds are intact, confirmed in my transactional history, sometimes i tend to spend some part of it or move it entirely to my separate bank, i do this to ensure that the money isn't a fake transfer, following this pattern will help, at least you have good proof when reporting such fraudsters to the higher authorities.

Everyone has a choice, what favors me today might now favor another person. There is no risk in P2P if you are careful, don't release when you haven't received the agreed balance.