The only list sites that are gonna potentially have responsibility regarding 2257 data (so far) are thumbnail TGPs. If your links are text only you bear no 2257 responsibilities whatsoever (though you have an ethical, and likely a legal, responsibility not to even text-link link to things that are clearly CP). Like another poster said, if anything about the submission smells funny, a responsible TGP or LL owner isn't gonna list it anyway, 2257 warning or not.
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