Where there’s a will…
If you don’t want your cat to disturb you in the bathroom, try locking the door, sealing up any gaps on the floor, and closing any windows. We can’t promise that you’ll be successful at keeping them out.
Cats will make any effort to get access to you, as this photo demonstrates. And that includes breaking into bathroom vents in order to see what’s going on! We can’t be too upset since it’s all for the sake of security.