And, if you are interested in ethics rather than loopholes, things like k-anonymity are not properties of datasets but of datasets with respect to an assumed co

And, if you are interested in ethics rather than loopholes, things like k-anonymity are not properties of datasets but of datasets with respect to an assumed corpus of other information. You have to consider how this new data could be integrated with other previous or future data releases and what level of anonymity remains after that integration. Eventually, if you work this analysis through sincerely enough, you will probably abandon all hope of maintaining k-anonymity in real data management practices. Then, you face your real ethical decision as you either drastically restrict the data or turn to lawyers and loopholes to assuage your guilt as you continue with the naive levels of protection demanded by your application and organization...