Exactly, MN. The "Tom Selleck has a temper" sniffing was the author's take on Selleck's behavior, not mine.
Apparently, real guns are used on the sets, with blanks, but, as with your example of Brandon Lee, it doesn't make it safe or smart to not handle them as one would any other weapons. Fortunately, Selleck as a gun owner and shooter, was there to impress upon whoever was present that guns are not toys, and just because it's TV doesn't make everything pretend.
This is what's the matter with society as a whole today - no working knowledge of, nor appreciation for, the tools of self-defense and liberty.