On a positive note: While I have major questions/concerns about distributing poorly secured fast reactors and toxic waste sites all over the planet, if this tech really does turn out to be a practical way to reduce the half life of waste...

Why not just turn the waste storage sites into reactor farms?

That would sidestep the problems stemming from decentralization and probably achieve some economies of scale too. Maybe smelt some aluminum with the energy. But even if you essentially threw the energy away, it might be useful as purely a waste cleanup solution.