[Bon mots]

After all, to any humans living in, say, the 1500's, our technology would appear to be magic.
If someone from the 1500's had even contemplated other worlds and how to contact them, they might have suggested signal fires, shooting lighted arrows into the sky, or perhaps setting out stones in large patterns on the ground.
We may be bombarded with alien transmissions, but they are as invisible to us as radio waves would be invisible to a person living in the Dark Ages.

Perhaps Neutrino Communications is the way to go?

[blueheron2]

Interstellar travellers will probably be mechanical/AI with no moral base. Life forms may not mean anymore to them than a virus does to us. Not needing air water etc. lets non living beings a hugh advantage in interstellar travel. They’ll simply be looking for supplies.