If you dig through to the source reddit posting [1], you can see that the post only really puts 6 different individual taxi IDs out there for visualization. To me, only the first 4 seem like a good visual fit for the prayer times, and the overall trip heatmap [2] suggests that they may just be part of a larger pattern of eating/taking a break at sunrise, noon, and sunset for all cab drivers. While the blog posting is begging the question of whether or not the data release contains personal data as a result of these findings, much more invasive findings have already been published (and posted to HN) with this NYC Taxi data, like corroborating individual trips by high profile people. [3] Notwithstanding the privacy issues and questionable methods used to obfuscate the data, I personally think that the release is a great step in the right direction for open data.<p>[1] <a href="https://www.reddit.com/r/dataisbeautiful/comments/2t201h/identifying_muslim_cabbies_from_trip_data_and/" rel="nofollow">https://www.reddit.com/r/dataisbeautiful/comments/2t201h/ide...</a>
[2] <a href="https://i.imgur.com/lyK0qTI.png" rel="nofollow">https://i.imgur.com/lyK0qTI.png</a>
[3] <a href="http://research.neustar.biz/2014/09/15/riding-with-the-stars-passenger-privacy-in-the-nyc-taxicab-dataset/" rel="nofollow">http://research.neustar.biz/2014/09/15/riding-with-the-stars...</a><p>EDIT: For better or worse, deducing ethnicity, country of origin, and/or religion is probably much easier based on this data set [4]. People have come up with analyses like this [5]. The data analysis is great, but my fingers are crossed that tabloid newspapers and their ilk don't pick this up and run off xenophobic, fear-mongering articles.<p>[4] <a href="https://data.cityofnewyork.us/Transportation/Medallion-Drivers-Active/jb3k-j3gp" rel="nofollow">https://data.cityofnewyork.us/Transportation/Medallion-Drive...</a>
[5] <a href="http://vizual-statistix.tumblr.com/image/107987401281" rel="nofollow">http://vizual-statistix.tumblr.com/image/107987401281</a>