This is nothing special guys and gals!!
All that has happened is that the original iPad owner has set it to automatically backup on a pre-defined schedule to his iCloud. Because it is still doing this (without the knowledge of the person who has misappropriated it) he is able to access his iCloud from his iPhone or PC and see what his iPad has been doing (cos the T-Leaf has been daft enough to take pix with the pad!)
There is nothing about remote operation or Big Brother here, just a simple backup