I think a way to overcome those privacy issues would be an interesting project. I&#x27;m not sure if that&#x27;d even be possible though - even if you set up a completely anonymous messaging system tied to lending records, Mallory could check out all the anarchist or communist or hacking or free-speech or number theory books (or whatever demographic she was targeting), then look like someone the _other_ borrowers of those books might want to meet...<p>Note that libraries have already started choosing the option to purge lending data to preserve privacy instead of sharing it to enable possible collaboration or meeting up:<p><a href="http:&#x2F;&#x2F;www.theguardian.com&#x2F;us-news&#x2F;2016&#x2F;jan&#x2F;13&#x2F;us-library-records-purged-data-privacy" rel="nofollow">http:&#x2F;&#x2F;www.theguardian.com&#x2F;us-news&#x2F;2016&#x2F;jan&#x2F;13&#x2F;us-library-re...</a>