A possible better solution is to use the wording of the regs against them.
the regs state that the location of the statement for a website is on its homepage or mainpage.
"(d) A computer site or service or Web address containing a
computer-generated image, digital image, or picture, shall contain the required statement on its homepage or principal URL."
So, since most galleries do not use the mainpage (index.htm, index.html, default.htm, default.html) and many of us have that page set up as our warning page (which of course gets bypassed when they click from the tgp/linklist/whatever) to the gallery. May I suggest that you place all your 2257 statements on your warning/home page.
I don't know if it would fly, but usually, if you interpret a law literally, you have a good defense in the courts.
And no, I am not a lawyer and FUCK NO, I will not pay your fees if you do this and it doesn't fly
