You can request to ban the user but the chances of the user being banned is very low. If you can read the forum rules then you will see that people who are scamming other people won't get banned but rather getting negative trust or red tag for every one can see if ever someone came across with the said account. It is always the case where if someone is proven to be scammer or a scam attempt that is surely the goal then you will see that it is always given a red tag or negative trust.