What makes them think that if it is found by some advanced civilization that they would be friendly?...........................
I wonder if the question is more existential (though with real life implications) and if AI is able to predict over under odds on such disposition on the possible aliens toward us?
Perhaps one of the words for water is an unforgivably deadly insult in the language of whatever finds the plate.
It says,
“We taste just like chicken!”
First reply, probably, will be “Oh, Oh... Earthmen... Scalp’em”