You're banned because it is that serious.

You're banned on behalf of Seriously Silly Billy.

You're banned this side of the Pacific.

You're banned for not saying why slowkneenuh is banned, just where he is banned.

You're banned for I plead the Fifth.

You're banned for pleading the Fifth on the Twenty-Third.

You're banned for not appreciating this version of Beethoven's Fifth (scroll down and click on "Taking The Fifth" sample):

http://www.arthurstead.com/Make_it_Magic-Classical.htm

You're banned for dragging Beethoven into this.

You're banned because how else could Arthur have gotten him here considering the fact that he is dead and now composes daisies rather than music.

You're banned because they call that "decomposing!"

You're right, I'm banned because I screwed up the joke due to memory loss. That used to be my favorite Arthur Fiedler joke (God rest his soul).

You're banned for banning yourself.

You're banned for Dr. David Banner.

You're banned because without the Hulk you would sulk.

You're banned for not stipulating whether you mean Hulk Hogan or Hogan's Heroes.

You're banned for my aching H's.

You're banned for Gamma Rays.

You're banned for a biological hazard.

You're banned for acid rain.

You're banned for chemicals.