You can do whatever you want, no one's stopping you from doing it.
However, might I remind you the consequences of scamming.
If you scam a MPGH user, you will be permanently banned.
If you scam a scammer (scammer is already banned), then you will be in one awkward position.
If the scammer decides to refund all of the previous victims and is lifted from their ban on MPGH, you would have to refund the scammer (the person you scammed), or be permanently banned.
In other words, don't scam at all.