Pros: keeps out riffraff, makes a sound so I know when Rascal goes through.
Cons: wicked ones can sneak out by tailgating on the designated users.
so, yes, it works, to a point. The point is that the Rogue has figured out how on earth Rascal is able to leave the house, lays in wait in front of the cat door and sneaks out with him (the door does, of course, close only when Rascal's tail is done going through, so anyone bumping close to Rascal's rear end can follow). Taken together it would work fine if there's just one cat, or if all of them are allowed equally in and out, or if the Rogue just would dumb down a bit