Let me answer this another way - with a real PocketRocket from MSR, its a very safe stove - at least no public incidences of blowing up on tender Scouts and young campers. With a knock off version from [China] costing less than 1/3 of the PocketRocket, who knows - in part that's what you pay for when you pay MSR / Cascade Designs their $39.95. I doubt if the knock off blows up in your face, you will have so much as a legal entity to sue for damages, or to recover your medical costs. You might get eBay to ban future sales, that's if you have a good lawyer and lots of publicity for your plight. But the simple fact is that its a simple stove design, more likely to clog irrevocably over time than to explode, so have at it.

FWIW I still have a PocketRocket gathering dust in my gear closet - its a nice stove, but I don't hook up to canisters all that often, and the Rocket burn is a little on the noisy side. (For all around cookery I really like my Primus that runs on white gas and other fuels).