at least two of these were not necessarily the fault of the user ( without context to go off of ) one the gun blew up and looks like it split the barrel, another I donno what happened by it shot **** out from the side of it. As for the guy in what looks like the lap/range firing and getting blasted back, thats not a normal gun its the Nitro Express which makes an elephant gun look like a joke
Quite a few of these were just people dealing with recoil for the first time. I wouldn't say they were stupid, just noobs.
As for the scope to the eye ones, that's another common noob mistake. Again, not so much stupid as it is new. I did the same thing my first time using a rifle with a mounted scope. It's quite the learning experience.