I thought it was pretty clear that the fake markings surprised me and that the adapters were not the main item sourced.
If you can get the shipments split, I'm sure you could also get them to not send the power adapters at all. If, however, you needed power adapters, you need to import proper ones - not just for legal reasons, but for the safety of the end-users.
Separating the shipment is a relatively low cost way to protect the main item.
Edit: Another example that happened to a friend. He ordered some single board computers that came with some software on a CD...he wasn't even aware of the CD. The CD had a fake "Compact Disc" marking, which is a trademark. Whole shipment seized.
Why is it CBP/custom's job to enforce trademark law? I could just as easily print a fake logo in the US, but border control won't come after me - the people responsible for enforcing those laws will.
It seems you have absolutely no legal recourse here too, and it hurts American businesses. I know the US is far from libertarian, but this seems like overreach in the strangest way possible.
Edit: Regarding below, sure. But there are tons of unlisted adapters that come with electronics you might buy. I'd hazard a guess that most people have at least one in their house. Not that it's okay, just noting that it's common.
I don't think anyone cares about Intertek logos. /s
It seems pretty clear to me, I think you're missing the point of the post. It's that this person is protecting his business in a way that's effective because the government isn't, and this is what he's forced to do when dealing with agencies that claim they're looking out for his best interests.
After this happened I found that's pretty common. Not that it's okay, but there's tons of generic electronics on Amazon that come with adapters with a fake UL mark.