User blog comment:AndImBatman/Why Call of Duty: Ghosts does not deserve it's unwarranted hatred/@comment-2.27.117.105-20131106212636/@comment-5596583-20131108142045

There are laws to war, typically enforced by every nation in the UN and NATO threatening to bring justice on the perpetrator. Admittedly, the authority of the UN and NATO may well have dissolved in the Ghosts universe, but there are obviously still nations capable of enforcing the rules.

The laws of war are the reason chemical weapons haven't appeared on battlefields since WWI, and why simple possession of chemical weapons was enough of a reason to invade Iraq.