Worse than "Cooking Whisky"? A friend bought a bottle of "Loch Dhu" at the Duty-Free on his way back to the UK, years (Decades?) ago, and eventually opened and tried it. It was a "Black Whisky", utterly disgusting, and his verdict was "I wouldn't clean spoons with it". I suspect he's regretting trying it even more now, since the perpetrating distillery is long gone and collectors will pay stupid prices (£250) for an unopened bottle (the best kind) of it.