I am by no means saying that "catching" a loaded gun is a safe act, but the chances of inadvertently pulling a standard, unmodified DA revolver trigger through its entire stroke while doing so are extremely low. Which is why I wanted to hear the details of Mr. Sage's story.
San Rafael gun range owner shot by customer - Marin Independent Journal
Basically, a customer dropped a Ruger Mark II or III - I forget which - grabbed for it as it fell, and put a hole in the range owner's gut.
Think about how most people simply grab at something when they drop it. If they hook the trigger guard, even with a revolver's DA trigger, there's a good chance it'll go off. There's not a lot of restraint in that snatching motion, they just grab hold with a lot of strength.
I'm less worried about dropping a revolver with the hammer resting on a loaded chamber than I am about someone grabbing at a falling revolver. At least if you let it hit the ground, there are transfer bar and intercept notch safeties.