The last line is being extremely optimistic. If you think about it, the universe is probably a dark forest, and if we find a signal, we should only study it; and find the origin. Then, wait and watch for a very long time. We don’t want to find out the hard way that broadcasting a powerful signal that can be detected light years from the source is suicidal. There is a very high likelihood that there are other species out there that are much more advanced than us and we need to be damn sure that the universe is more like Star Trek and not a shooting gallery.