Falling back to other players is very nice for some fun contraptions, so I would like to keep this option enabled

But interplanar projectors can be used maliciously with it, uploading images from victim's computer without them knowing
So I think the camera should check the owner of the interplanar projector, and malfunction otherwise

Oh, I haven't even thought of that interaction. You're right, it's not something that players would want most likely.