For that application, yes. Some target pistols, like for long range silouhette shooting, are sometimes set that light. But a revolver for a movie? Yeah, nutty.
I don't know that there's an appropriate trigger pull for the application of "killing your employee".
That might sound like a smart a** response, but I am a bit familiar with trigger pull of competitive pistol shooting. For conventional pistol, the general concept is roughly that the trigger pull should roughly be equivalent to a grip strength required to keep the pistol from shifting in your hand after firing. That's dependent on the size/type of the gun. For competition, conventional pistol centerfire, it's 2.5 pounds. 22 is 2 lbs, .45 is 3.5. Those really don't feel that much different, except 3.5 is a little heavy. Now that's all single action. DA and striker fire guns all have a much longer trigger pull, and generally heavier by necessity, too. Within all those ranges, I've not heard of anything correlating safety to a higher trigger pull, except by mainstream press. Now that said, if you're used to military firearms with dismal triggers, or DA guns, a 2lb trigger might catch you by surprise. But that should be a "I didn't expect it to break that soon", not a "not my fault that I pulled the trigger and it fired like it was supposed to". Or in other words, if you're taking up slack, that's not a good plan unless you are good with the direction it's pointing. (Free pistol? Now that'll absolutely catch someone by surprise. IIRC, less than 3 oz. Not a fan.)
Anyway, to me the question of trigger pull for what should be a prop gun, not a firearm, doesn't make sense. In an unmodified pistol, a blank has almost no recoil at all. So there's no reason to have the pull be related to required grip strength. It goes back to the concept of pointing an actual firearm at your employee and pulling the trigger. A non-shooter, IMO, isn't going to be able to tell the difference between 2, 3 and 4lbs. Even someone that shoots a couple of hundred rounds a week isn't likely to notice a half pound different in a gun that is a different model than they're used to, in my experience. (Handgun, can't speak to rifle with any certainty there.)
If the firearm had been rendered inoperative in what was believed to be a non-reversible way, for example by removing the firing pin and modifying either the frame or hammer so that one could not be installed, then I can see there being some question.
