Via Tao Takashi, um blogue que recomendo, “The CopyBot controversy“:

The important point to note here is that all the objects (in the form of prim data) and textures (as bitmaps) will be transferred to your client which constructs the image from it […]. As this description implies it is always possible to copy this data. […]

CopyBot is just one application which can do this task of copying objects.