[arkades]

I agree, but the argument is also bullshit. You've changed the [noun] specifically to create an example where disposal is onerous. If disposal is not onerous, it looks quite a bit different. Are we so inflexible in our thought that we require a strict rule to be applied all cases, without the bit of common sense that says: "If you created a massive burden on me, it's your responsibility. If you created a negligible burden on me, who gives a shit?"

If they delivered, instead of two tons of mulch, a single unit of scotch tape, would you still give a shit about whose responsibility disposal is?

We can go ahead and treat these cases as distinct, because they're distinct. You recognize that implicitly, which is why you made your example two tons of mulch, and not 2 ounces of plastic.