Gotta say, this argument that you aren't responsible for the illegal items in your shipment, and the sender isn't responsible for them either, really drives home to me the importance of these CBP inspections.
I didn't say I wasn't responsible. Just arguing what the consequences should be for what was pretty clearly an unintentional violation.
Also, see my friend's experience of a CD-ROM with a fake "Compact Disc" mark that resulted in a shipment of SBC's getting seized. Perhaps that one is more clear where the receiver wouldn't have any idea to even ask: https://news.ycombinator.com/item?id=24469959
I will also hazard a guess that many HN folks have ordered things like generic arduinos, led blinky stuff, etc, and gotten an adapter with a fake UL mark. Smaller scale, but the same thing nonetheless.