We've happily fucked future generations by being scared of nuclear (with the fear campaign funded by fossil fuel companies), and bring about climate change.
That is shameful, and the anti-nuclear crowd can take responsibility for that.
I'd be more concerned about the next 100 years, than pretending we can predict what things we do today will be a positive or negative for 200 years from now, let alone 1000s.
And anyway. If you bury this stuff deep enough, encase it in glass, it's going to take a fairly advanced civilization to get at it. They'll quickly work out the risks involved after playing too much with their newly found treasure. Then they can decide whether to leave it be, or whether it's a boon.
And I said "making future generations pay for our current consumption"
Surely that is shameful?