Spotted this review on IMDB:

Summary: Probably one of the most intelligently written screenplays of alltime.

Any idiot can sit down and spend four or seven years of his life writing out his "masterpiece." You do some research, you do some hard work, you get a little help from friends and family, and you get it done. But, it takes a true writing genius (or geniuses, in this case) to create something as original as "Bill & Ted's Excellent Adventure."

A tiny corner of my mind screams at me that this guy could actually have been serious.