If there's one thing about landlords it's this: they will attempt to get away with whatever they can. Because they often have nothing to lose. It's much easier for them to deal with complaints as they arise rather than trying to get ahead of anything that might go wrong. They hold all the power, and absolute power corrupts absolutely. That's why it's the tenant's job to become the permanent thorn in their side. In order to get their attention you have to make a stink about absolutely everything. That's the only way you'll get anything done.
Sure, this might be a nuclear attitude toward landlords, but I stand by it. I stand by it because of stories like this one, where a landlord attempted something so out of pocket that Redditors had a lot to say. Get the details of this terrible breach of social contract below. And be glad this isn't your landlord.