Don’t trust anyone over 30 was a well-used phrase during the 1960s and early 1970s during the days of hippies, Woodstock and anti-war protests. In 1976 MGM released a movie titled Logan’s Run in which computers don’t allow anyone to live past the age of 30. Blogger Gary Loggins gives a great overview of the story without giving away the ending in Don’t Trust Anyone Over 30: LOGAN’S RUN.
Reading that post evoked wonderful memories, in part because they filmed the ending in the Water Gardens in downtown Fort Worth, where I was living. Considering the CGI graphics used today, the minimal special effects in Logan’s Run are nothing, but they were glorious then. However, George Lucas blew the magic of Logan’s Run out of the water a year later with the release of Star Wars.