Quite frankly it's none of anyone's business why other members have been banned. If you are friendly with that person chances are you can contact the person through facebook, msn, or another forum. If you are not that friendly why are you interested? other than just curiosity I can't really think of a valid reason for needing to know.
This is Exactly What I Have To Say.
No Need For It.
Extra Load On Staff[Unnecessarily].
Staff Are Doing A Great Job As It Is.