“Just Say Do!” is obviously a play on words, primarily inspired by Nancy Reagan’s naively simplistic solution to the problem of drug abuse among American youth: “Just Say No!” I would like to hope this undertaking will have more success than that ill-fated attempt at social engineering!
It also takes some inspiration from Homer Simpson’s famous monosyllabic utterance whenever he has done something stupid or embarrassing, which has quickly taken on a wider cultural life of its own, usually meaning something like, “That’s a no-brainer!!”