I vote for setting up a Joey filter!Whenever Joey reads the board, his posts is shown. Whenever anybody else reads it, his posts is subtly left out of the thread. Alternatively a checkbox in the personal settings controlling it, named "Stupidness filter" or something.
But, as long as we don't have to keep up with the troll's of Slashdot (FP anyone?) I won't complain (too much).