When an item drops in a raid that everyone is allowed to roll on such as an orb, mount, bag, or quest item(and its not on master looter for whatever reason) why is it tradition for everyone to roll greed? This happens most often in Sarth or Ony pugs where they forgot to ML. If everyone has the same right to it then why are you enabling ninjas? Everyone rolling need is exactly like everyone rolling greed except it ensures fairness rather than tempting jerks to hit need after everyone else greeds. This is a very common practice and to me its such a huge logical fail that I cant' figure out where the tradition came from.
If you're a raid leader and everyone is expected to roll on an item it should be a need roll. Asking everyone to greed is just inviting trouble for absolutely no reason other than "tradition."