Also it shows an enormous ego. Mr. Lippert thinks he is as smart as Feynman but he is not; he just makes Feynman sound like a pedantic asshole.
Mind you I agree with his point that those questions are silly, but again he can make this point without bringing in Feynman's corpse and using it as a sockpupet.
And for the record: I do not think that I am as smart as Feynman; that would be ridiculous.
The piece was intended as satire, and is in a long tradition of such dialogues intended to ridicule a "straw man" of a particular position. Consider, for example, Gallileo's Dialogue Concerning Two World Systems, in which the scientist, Salviati, criticizes the position of Simplicio, who believes the earth to be the center of the universe.
I couldn't think of a better modern figure to stand for science, reason, clear thinking, and a mischievious sense of fun than Richard Feynman as my Salviati, and I hope that he would appreciate the spirit in which it was presented.