I think that bibliographies are very important. Everyone knows that quote by Picasso, "Good artists borrow great artists steal", but that doesn't necessarily mean that the "great artist" wouldn't be punished for stealing! Bibliographies are a sign of respect, that you acknowledge the person the information is from. By just copying and pasting facts for one of your pieces without noting the fact that that information came from others... That's just... Not cool man, not cool.
So, kids, write your BIBS!