Why DayZ and Rust do get a lot of bad press for being a glorified game version of the Zimbardo experiment, the reason people are investing in such games as they want to take the next level of Zombie games over the single player kind of State of Decay, Project Zomboid and the fact-pace multiplayer such as Left4Dead series and combine them together so they live in an immersion zombie apocolypse world.

Unfortunately, there are people with questionable morals given the fact it is only a 'game'. By this, death doesn't mean anything. If it was the realworld and your death meant it all, you will quickly find people being a lot more co-operative, unless resources got scarce, then they would rip eachothers throats out.