> There's nothing interesting (e.g. terrorism, bombs) you can do with nuclear waste, and it's not especially poisonous.

LOL. Nuclear materials, including waste, are extremely dangerous in evil hands. It regularly kills people by accident or due to negligence. Chornobyl was an accident. Just imagine what a team of motivated people with evil intent can do with a nuclear station or nuclear waste. Last attempt to use nuclear waste in war was in 2015: Russia-backed terrorist planed to use radioactive waste (Kyshtym) to throw a dirty bomb at Kyiv.