Knowingly isn’t intent. It’s knowledge. Both the sender (this UK service company) and the troll fit knowingly for almost any definition I can imagine in this story. The UK sender triggered it on a second notice, after the museum had responded. The troll knows they do not own the copyright.

I think bringing this in a jurisdiction with sensible judges - Northern Cal, SDNY, Delaware, does not look impossible to me. And, it only takes one win to radically change the economics of these trolls — it seems worth doing, is all I’m saying!

You still have to prove it in court, and it's already hard enough to prove seemingly obvious things, such as that a seller didn't deliver a product.