What part of 'we're investigating whether disregarding the conventions in games leads to disregarding them IRL' says to you that they don't care about it being properly applied in real life?
I misread (or rather responded to the comment and not the article).
I am more concerned with violations occurring not because a game does not enforce/demo the conventions, but because of a loss of control and highly emotional charged reaction to the actions of the enemy.
The game industry might be able to incorporate demonstrating the convention through story-telling/roleplay mechanism, but it has to make sense. For example, have a scene following an intense fire-fight were the squad's sergeant goes around administering "last rites" to wounded enemy soldiers (a violation of the convention). Have a mission go-by and then have the character and another member of the squad called into a Colonel's tent, followed by a scene in which the sergeant is arrested for war crimes.
I however do not see a game where after each fire-fight, you have to wander around the map checking the pulses of all the guys you shot and then administering first aid to the living being very entertaining.