Maybe there's another side to it. Does a guy who does this on the internet have a girlfriend? What do his parents think? If this doesn't fuck up your life, I could see it as a source of harmless fun.

it's not that doing this fucks up your life, it's that this whole zombie thing seems to be a pretty transparent way to simulate murdering another person in the most gruesome and lifelike way possible.

Yeah. Zombies were ruined for me a long time ago. I miss the days when I could watch Return of the Living Dead and just really enjoy the novelty of it.