LOL! Cats can actually be scary smart. Our cat Numfar actually figured out that doorknobs open doors and that you have to twist them to make it work. So far, thankfully, she hasn't been able to get enough leverage to make it work... but we're *never* going to put any of those lever type knobs anywhere in the house.

You could always do what we ended up doing in our closet. We put a small cat bed (more of a pad, really) on top of the place the cat decided she liked to sit.