This may seem like an odd choice, but these creepy-rollers are already designed to be kind of stalker-y, just roaming around your house aimlessly. I'm not entirely convinced that the Roomba isn't already used as a device for spying. (If so, thanks to the National Security Agency for at least helping tidy things up while keeping tabs on us.) Fortunately, if you want to get into the mind of a Roomba before it develops one of its own you can get started with the latest version of Robot Vacuum Simulator. See how they see us before they wake up and clean our clocks...and everything else.