Call Of Duty Modern Warfare 2 How to do Prestige Hack Level

So I received a random message by this guy named "Fausto72" saying that he is creating a 10th prestige lobby, this means that they could level me up until 10th prestige (duh...). But as always there is always a price before they could let you have it. there are lots of ways of why this is lie and a trickery.