The ominous warning was designed to force manufacturers and retailers to be honest, not to scare you in your own bedroom. Those “law labels” are there so you know whether you’re sleeping on clean fill or mystery leftovers, and they must stay attached until the product reaches you. Once you’ve bought it, you are the consumer in that sentence—and the law steps out of the picture.
Still, that ugly tag can be more useful than it looks. It often carries filling details, safety information, and sometimes washing or warranty data that can save you money or hassle later, especially with mattresses, kids’ items, or anything you might return, donate, or resell. So the real choice is simple: keep it if you need the info, or cut it if it’s driving you mad. Legally, your scissors are completely in the clear.