I tend to agree, but the author picks an odd example. The Wallet Ninja appears to be a product in the vein of the swiss army knife, an IMMENSELY successful product.
I had a Wallet Ninja several months ago and it could be useful every once in awhile. I'd go the airport though and I would be stopped every time, and I'd have to talk to the agent and insist it's TSA compliant. After a handful of times, I decided it was nowhere near worth the hassle.
You will have the same problem with a swiss army knife and TSA. Not sure what you are trying to say with your comment.