Hussar
Legend
What's the difference between moving the ogre and a random encounter though? Why does what I happen to have prepped have any bearing on what's going on in play? I frequently have barely anything prepped beyond a vague idea of what's where. That the dungeon says, Room 2 Ogre, Room 3 Empty doesn't actually mean anything.I would be one. It’s no different than fudging dice rolls or padding hit points or adding monsters to a fight. If that’s what I prepped, that’s what’s there. Emergent story. Let the dice fall where they may.
I don’t think that’s a reasonable way to determine things. The group will not always...or hardly ever, really...have enough info to make a perfect choice. If the door is trapped and the never looked for traps, it’s still fair to hit them with the trap. If they look but fail the check, it’s still fair to hit them with the trap. The players can’t expect perfect knowledge for every choice.
And, frankly, all this does is lead to the DM becoming somewhat more elaborate - well, the monsters wander around the dungeon right? So, it happened to be there instead of here. Heck, lots of adventures specifically STATE that a particular NPC might be encountered a various locations and often leave it to a random roll or leave it up to the DM.
Putting the ogre behind a different door can be a bad thing if the DM is doing it to screw over the players. IE. acting in bad faith. But, adding monsters to a fight? Again, that's often right there in the adventure. Random encounters don't only happen after the PC's have cleared a room. And, monsters typically do have ears and do wander around their home. It's certainly not unreasonable.
Like I said, arguing that you must never do something like this is ridiculous because there are all sorts of very good reasons why you might. But, what we can agree on is if the DM is doing it in bad faith, THEN the players have an issue.