It's also kind of silly if you consider the poem that inspired the Poppy symbol didn't actually specify a colour.
I suspect what they have done is misinterpret the third verse:
Take up our quarrel with the foe
To you from failing hands we throw
The torch; be yours to hold it high.
If ye break faith with us who die
We shall not sleep, though poppies grow
In Flanders fields.
I suppose that could be interpreted as 'keep fighting those we disagree with or we will haunt you forever', but when you read the whole poem, it's about not letting them die for nothing, whether that be through Peace or War, their ideals should not be forsaken.