While some people keep harmless clutter in their glove compartments—like old hand sanitizers, freebie lip balms, or even actual gloves—others may unknowingly store items that could lead to bigger security risks if stolen.
Creative landlords can find any "emergencies" if they are motivated to snoop. I love the motion sensor and internet-enabled cameras I install around any rented unit. If the landlord comes in when I'm not there, I want to know why.