Real world proof of this problem happening, it's not just a video game problem folks! Ref
Albuquerque Police Marksman Steve Rodirguez peered through the scope of his high-powered rifle targeting Mexican national, Miguel Antonio Dominguez-Flores, who was trying to make an escape from a foiled bank robbery.
On November 7, 1993, Dominguez-Flores, 45, the director of a Mexican technical school, held up the United New Mexico Bank branch at Montgomery Boulevard and Pennsylvania Street in Northeast Albuquerque.
He held a handgun to the head of a bank teller he took hostage just outside the front doors, as he tried to negotiate for a vehicle after police officers rushed a side entrance forcing him into the parking lot. (APD Records, 1993)
Dominguez-Flores told Deputy Chief Nick Alarid that he also had dynamite wrapped around his body.
He did not have a bomb.
Officer Rodirguez fired.
Dominguez-Flores pulled his head up looking for where the sound came.
Rodirguez was surprised that he missed and fired again.
Dominguez-Flores looked around but did not harm his hostage.
A former special weapons and tactics team member, Patrolman Bobby Vasquez who responded to the call noticed that the barrel of Rodirguez' rifle was aimed at a wall about 15 feet in front of him while the scope mounted several inches higher allowed the sniper to see his target clearly.
The first two shots had struck the wall.
Vasquez radioed Rodirguez telling him to straighten up and try again.
Rodirguez fired again and Dominguez-Flores fell instantly dead from a shot to his head.