Re: Guns don't kill people. People kill people.
Chris Rock stole it from Pat Paulsen. But then I expect the Smothers Brothers were a bit before your time. And I fully expect Pat Paulsen stole it from some other comedian.
I can't find the particular reference I'm thinking of on the internet, it came from a vinyl record my mother owned. Part of the schtick included "This should work particularly well for hunters who claim it is all about sport anyway. Imagine the sport of sneaking up on a bear with an unloaded rifle."