According to Hirabayahsi, he "came up with that idea while drinking. The aliens probably won't understand that (kanpai and toast) part." We can only hope that whoever is looking for life at their radio telescope up there won't be drunk as well, if only to ensure good inter-planetary relations from the start. Example:
Whatever happens with the decoding of this binary message, at least it gives a little hope to Mulder-wannabes and tinfoil hatters all over the world, who may see alien contact in just seven years. Otherwise, the prospect was quite bad: US scientists sent another message to M13—the Hercules globular cluster—thinking that having a big concentration of stars, it may give us a bigger possibility of getting an answer back, instead of Elvis singing back "Return to Sender." Unfortunately, they didn't think that the waiting time to get a message back from a planet in M13 would be a bit too long: a mere 46,000 years.
While Hirabayashi is hopeful that his message was received in 1999 and now a reply is getting back to be received by any Jodie Foster listening out there, he knows that it's highly improbable that it would work. "I believe in aliens, but they are very difficult to find," he says.
If you add the fact that Altair may not have any planets at all, the chances are extremely slim. Still, he says that they did it because "it was good enough," and he is glad about it, especially after all the messages he got from schoolchildren everywhere: "children's response is the best thing."