For reference, the message parent quoted is a Long-time nuclear waste warning message:
https://en.wikipedia.org/wiki/Long-time_nuclear_waste_warnin...
Otherwise, "curse of the mummy? LOL, yeah, I'm sure that's a real thing. Must be something great buried here. Watch out for actual traps, but we're about to get rich, boys!"
This is pretty well guaranteed if they can read your message at all.
Though maybe there's only a brief window of development in which a culture is both not superstitious enough to be scared by this, and also lacks the technology & knowledge to figure out what you actually mean and verify it themselves.
- A descendant language had been preserved in the Coptic Bible.
- The Rosetta Stone provided a parallel text between Egyptian and Greek, and Greek was well understood.
But the ability to read Greek gave us more than just an understanding of what the Rosetta Stone said. The Greeks wrote a lot about Egypt, too.
I’m not saying the experts did a bad job at all. This is probably about the best you could do to communicate with a culture of unknown technological complexity, far off into the future. I’m just saying, as good as it might be, this communication is likely still pretty imperfect :)
In a way that is true. You could in principle use the radiation from nuclear waste to do useful work (like generate electricity), but our sages haven't figured out a way to do so in a way that makes economic sense to us. The waste could be useful to a different civilization with better technology or worse natural resources.
"A terrible sickness is contained underground. It kills all who come close. We have done our best to contain it so it does not kill you, our children. We have hidden it. It is very deep. You are safe if you do not dig."