I heard a different version of the same idea at Boskone once, but here is a pretty good send-up of what might occur at a customer review session. (Warning, however: Low production values.) Also, in case you missed them, considerably funnier are a couple of classic Star Trek filksongs, especially the first.
While I’m on the subject, a couple of more serious filksongs I really like are:
Other great serious filksongs are “Queen of Air and Darkness” (Poul Anderson lyrics) and Jordin Kare’s “When the Ship Lifts, All Debts Are Paid”, but I can’t find recordings of those now.