Im suggesting that a plot could have potion effect commands like /plotme potiondisable (potioneffect) so that potion cant be used or /plotme potioneffect (effects you want). Whenever i decide to make a maze thats really dark, i worry that people will use nightvision so i figure this could become a thing.

Thanks for the suggestion! I can't help but think that this would take away too much control from the player and become really annoying when traveling between plots. Perhaps adding a single-target potion effect command for command blocks would be sufficient?