To talk about the randomness of a bit stream without keeping in mind the context of that stream will lead one to make assumptions that simply are not valid. An example is probably best. Consider I work as a musician and record my work on a floppy disk. In the context of a musician that data is highly non-random. However, if I then take it and put in a airplanes inertial navigation computer the lord only knows what the computer will do. From the pespective of the aircraft the data is random and senseless. Another example you can do at home is to take a computer CD and play it in your audio deck. If you measure the resultant you will find a musicly random stream of noise coming from your deck. The same can be had if you try to 'run' a music CD as a program. GIGO is not absolute but rather relative to the context of the data and the milieu that it was created and interpreted in.