Just like the Star Trek TNG episode "Clues". Humans are a far too curious species for any smoking guns to be left around. I agree with you, our successors will

Just like the Star Trek TNG episode "Clues". Humans are a far too curious species for any smoking guns to be left around. I agree with you, our successors will question why there's a tunnel in the ground, why a painted stripe appears within the tunnel, and for what purpose the tunnel was hidden. Though I'm incredibly pessimistic about our future, no matter what signs and warning we give, human curiosity wants to know for what substance those warnings are there to dispel people from, and human greed will ironically want to claim it all.