Although Zappa wasn't a big drug user, many of his listeners were (I did see him light a doober on stage at the Baltimore Civic Center, though...). They don't make LSD the way they did in those days, don't think he'd be as influential as he was if the time was shifted.
Spinnin' Shpongle ~ 'The Museum of Consciousness' in honor of my druggie daze!!!! Ahhhh!!!!!!!!!!