All's i'm saying is - If Moriarty is not dead after all then there's plenty of ways to get around it with fake guns etc...
It's definitely possible. I thought that when the Reichenbach Fall first aired. We seem him fire and fall and some red liquid come out the back of his head, but that's not proof.
When they had all that "did you miss me" stuff at the end of His Last Vow, I did think that maybe Sherlock himself set all that up, as a way to keep himself out of prison/exile in the event of him having to do something like kill Magnusson. But then, at the very END of the credits, we see a actual clip of Moriarty saying it, rather than the cartoon versions before the credits. So I dunno, he could well be alive.