Whole Foods (Nasdaq: WFMI) CEO John Mackey, using the name "Rahodeb," posted more than 1,300 times on Yahoo!'s (Nasdaq: YHOO) Whole Foods message board from 1999 to 2006. What should investors make of the news? Should Mackey resign? Should shareholders be resigned to lower returns? In this installment of Fool Video, I ask Motley Fool co-founder David Gardner.