This is sounds like a legitimate idea but you can use events to make sure players dont go down the wrong hall and make it so they can only stay at the door for like 10-30 seconds then instant respawn and stuff like that its like a 20/20/20/20 mode sorta
If you're eventing players to be the enemy, it would be just as easy to event bots to do the same thing. Bots can also stare creepily at the cameras until they decide to move again, meanwhile players will be standing around bored for a while spinning around and flailing their arms for half a minute.
In any horror setting, suspense, tension, and buildup are what make the situation scary. You simply can't ask players to do this because they have the built-in desire to win more often than they have to be scary. Believe me, I've been down this road before, and especially in Blockland, horror PvP won't work, at least at its core. If you design a PvP game with a horror element tacked on it will work out great. If you design a horror game for use in a PvP environment, it'll lose most of its scares.