I remember that ad and the whole campaign against Barry. I was even a spontaneous demonstrator for Barry at the San Francisco Convention in 1964 (boy, how San Francisco has changed!). There may have been a bumper sticker like that somewhere, but what I remember is Bill Buckley's quote in NR sometime in '65 or '66:
They told me if I voted for Goldwater we'd be at war within six months.
I did and we were.
I was in fifth grade during that time, and I still recall some of the jokes from that nasty campaign. Juvenile humor, you understand. Something about Johnson's Earwax and Barry Toiletwater.