What's the difference between distributing open-source with a known vulnerability and distributing open-data that knowingly violates the privacy of many people? If this was source code, there would be "responsible disclosure" that allowed the software author time to issue a new release of software. One could similarly work with NYC citygov digital team to anonymize the data properly and have them reissue an official dump, possibly with additional data from 2014. That would provide some incentive for developers to use the newer data.
Yes, malicious analysts can find the old data. But that is no reason for non-malicious analysts to keep replicating data that violates privacy. If this were data where the loss of privacy had significant financial or legal consequences, then naive data distributors and analysts would be inadvertently contributing to those consequences.
One should try to do the right thing, even if it seems technically pointless. In this case, working with the people who shared the data to fix the mistake. Otherwise, one could imagine future citygov publication requiring much more slow and expensive review of data to be released, e.g by lawyers who still won't find the next technical mistake. It's in the interest of all parties to make this particular instance right, to ensure future openness of privacy-protecting data.
