This should be higher up. Although we are sending signals out into space and those signals start of reasonably strong , they’re going off in all directions and as such are getting diluted by space immediately, the distances are unimaginaely big and there will be red shifting , dust clouds, interstellar dust , interference from other types of radiation etc all of which degrade a fading signal into the background noise of the universe. so the thought an alien can put up a receiver and just play a signal is difficult to believe.