How exactly does publishing a list of malware-infected stores fall under the DMCA? I always thought DMCA was meant to be for copyright infringement cases. I didn't see the list, but did it by any chance contain the logos of the online stores? If it did, the DMCA notices make sense.
As long as you're okay being found guilty of perjury by a US court, or have no plans to enter a US jurisdiction in the near future, you can get any content you want taken down from any site that's required to follow the DMCA.