What would really be incredible would be if the city made this kind of data public intentionally.
It currently has 22 million parking tickets dating back to 2008.
As it is, it would likely be an effective way to track someone's routines. All you need is a license plate and you can likely get a list of many places they've been since 2008. That's especially true since it includes citations for things like street cleaning violations, which in my experience most people will get at least once when living somewhere. I bet a lot of those plates can be tied to at least the block the owner resides with this dataset.