This idea is nice but I think you don't understand how much actual time it would take to create an original community exclusive map. No matter how much money could be pooled into this project, it would take years before we could see anything close to how finished Chernarus or Livonia are. I don't think it's even feasible considering all the hurdles that could slow the progress even more like devs dropping out because of RL reasons and so on.
We've never needed it before and the only reason it's even being mentioned right now is because of RL events. I don't see how it's needed seeing as hygiene is seldom if ever mentioned in game, nor is it tied to a game mechanic like it is in the game SCUM for example.
I'm sorry but someone would only do this because they're trying actively to bait you into a KoS report or they're just trolling. In this case they would be the ones effectively trying to ruleplay and obviously NVFL. I would've shot them too without a doubt and I haven't shot anyone in more than a year.