I don’t see that as being much of a problem. Although we would not be able to detect regular Earth signals, we are relatively near the point where we would be a

I don’t see that as being much of a problem. Although we would not be able to detect regular Earth signals, we are relatively near the point where we would be able to detect Earth, including its atmospheric composition. Given we’ve already sent the Arecibo message, we might be likely to send such a signal to Earth. If so, other beings may as well. I think the real problem is the timing. It seems unlikely that anyone will be looking at the same time anyone else is sending a message.