I keep looking on LP.org for that fabled "Shun List" but it's never there. Mrs. John Q. Public wants to know where it is, too, so that she can go shopping in peace. "Heavens! Your nametag says 'Mike'? I think there's a bestialphile on my Shun List with the same first name. Is that you? No? Well, maybe I don't trust your answer, and will refrain from buying my crack cocaine in your store from now on, and I'll be sure to complain to the LP.org over your lying to me, too!"
They read about it in The Moon Is A Harsh Mistress and thought it sounded kewl.