Why, Mr Bo Jangles:

    When plucking at your banjo, you sure should not forget
    You is suitably armed, and can deal with disrespect.
    Dance softly with joy - knowing this is stays true
    A banjo makes a good club, should some-one mock you.   
   
    Grip it firmly by the neck, as if it were a baseball bat
    Swing it high in the air and firmly down - just like that!
    Onto the head of that ignorant jerk in the crowd
    And his resulting silence will let your tunes ring loud.

    We banjoists can walk with head held high
    For with banjo in hand, no-one dare us decry:
    When persons mouth off to cause musical obstruction
    Then make your banjo a weapon of trash destruction.

At least, I think that is what my mommy once told me.