Hackers Can Disable a Sniper Rifle–Or Change Its Target
wired.com
wired.com
So, at least some of the worries of their hardware being insecure are moot.
I am well acquainted with one of the neighbors in that building.
The saving grace is as the CEO comments:
“The shooter’s got to pull the rifle’s trigger, and the shooter is responsible for making sure it’s pointed in a safe direction. It’s my responsibility to make sure my scope is pointed where my gun is pointing,” McHale says. “The fundamentals of shooting don’t change even if the gun is hacked.”
As long as you're following the Four Rules (https://en.wikipedia.org/wiki/Jeff_Cooper#Firearms_safety) at worst these hacks will brick your rifle or make you miss, but in practice they wouldn't make you hit something you're not willing to hit.
If that's true, you don't take the shot, with rare exceptions like hostage shield situations and war, which these guns are not suitable for.
The rules exist for many reasons, including that we don't entirely trust the gun or ourselves. These guns provide additional failure modes, but the existing ones are bad enough.
It might have even been hacked or jammed in the climax, my memory of the movie is a bit fuzzy.