If the gun was a real gun and the user had a reasonable expectation to assume the gun is loaded with live rounds, of course there would be no question. But in this case, we are talking about gun used on a movie set which is supposed to be loaded with blanks. In fact, the rules state there are not supposed to be live rounds used on movie sets. The question is, did Baldwin have a reasonable expectation that the gun was safe? Was he told the gun was safe?
When movies are made guns with blanks are used for authenticity. But they are absolutely pointed in the direction of other actors to get the right action shots. Heck, I have been to wild West shows where they use blanks to re-enact scenes from the old West where fake gunslingers shoot at each other. I am not excusing Baldwin's reckless behavior. I am asking, maybe even debating, whether it was criminal.
Let's pretend it wasn't Alec Baldwin. What if it was Jason Mamoa, or Harrison Ford, or even some stunt guy.