There's a limit to how much such data can be truly anonymized, especially when it can be combined with other data sources.
Would you be ok with someone relating an "anonymized" database of fingerprints? Of sequenced human genomes? Of credit card transactions? Anonymization is tricky.
That's the problem AOL ran into when it released their anonymous web search data several years ago.
I think their hearts were in the right place, but it turned out, even though AOL had no interest in attaching real names, that there were enough artifacts in there that other people could. Especially if it spilled hot soup on AOL.
Would you be ok with someone relating an "anonymized" database of fingerprints? Of sequenced human genomes? Of credit card transactions? Anonymization is tricky.