I like it because it emphasizes, well, how incredibly dangerous firearms are [...]
Eh, from what I've seen and heard (mostly from you and other HLPers), this is what the entire game is about
. But in the case of the Glock, it's more of a reminder of how unfortunately disconnected is simulating things in games to actual real experiences. That reminds me of how I tried to play Forza Horizon 4 at a friend's place with a proper racing setup (wheel + shifter + paddles), and how unbelieveably offputting was the lack of G-forces...
That said, still. When you operate - holster, unholster, wave around - your firearm, you absolutely always keep the finger off the trigger, period. On every half decent shooting range you get that hammered into your head immediately, and it's the first thing that should enter your muscle memory. This is the right way to hold and carry a weapon. In reality, you actually have to put in some effort to holster the weapon not safely and shoot yourself, contrary to the game. (That said, not having a chambered round or using safeties if the gun has any is a way to protect yourself from your own mistake)
I like the concept of the game though. Seeing in how many different ways can something wound or kill you is one of the best ways of teaching people how and why to be really careful with it and how to use it properly. A thing that the vast majority of shooty games just entirely disregards or skims over. That'll really make for some more people educated on weapon safety out in the world, and also they'll be enjoying educating themselves like that. Which is good.
Besides I work with electricity and this rule just gives me a reminder every once a while, so I think this doesn't only apply to weapons and that I at least partially know what I'm talking about
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I wonder if such mechanics ever make it into any other shooty survival games. For example, multiple mods for Stalker series games have mechanics of taking care of your weapons (mostly weapon repair/cleaning but nothing very in depth), but not really anything on properly using them. Something like this would be neat to see.